\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh, thu th\u1eed l\u1ea7n 2 n\u0103m 2016. Theo \u0111\u00f3, \u0111\u1ec1 thi c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i chi ti\u1ebft, c\u00e1c em tham kh\u1ea3o ph\u00eda d\u01b0\u1edbi.<\/strong><\/h2>\n

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Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh<\/p>\n<\/div>\n

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C\u00e2u 1:<\/strong>(ID:91203) <\/strong>M\u1ed9t gia \u0111\u00ecnh: ch\u1ed3ng c\u00f3 m\u1ed9t t\u00fam l\u00f4ng \u1edf tai, v\u1ee3 b\u00ecnh th\u01b0\u1eddng. C\u00e1c con trai c\u1ee7a h\u1ecd<\/p>\n

A. <\/strong>t\u1ea5t c\u1ea3 \u0111\u1ec1u c\u00f3 t\u00fam l\u00f4ng \u1edf tai<\/p>\n

B. <\/strong>m\u1ed9t n\u1eeda b\u00ecnh th\u01b0\u1eddng, m\u1ed9t n\u1eeda c\u00f3 t\u00fam l\u00f4ng \u1edd tai.<\/p>\n

C.<\/strong>t\u1ea5t c\u1ea3 \u0111\u1ec1u b\u00ecnh th\u01b0\u1eddng.<\/p>\n

D.<\/strong>m\u1ed9t ph\u1ea7n t\u01b0 c\u00f3 t\u00fam l\u00f4ng \u1edf tai, ba ph\u1ea7n t\u01b0 b\u00ecnh th\u01b0\u1eddng<\/p>\n

C\u00e2u 2<\/strong>:(ID:91204)<\/strong>\u1ede m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt, alen A quy \u0111\u1ecbnh th\u00e2n cao tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen a quy \u0111\u1ecbnh th\u00e2n th\u1ea5p; alen B quy \u0111\u1ecbnh hoa \u0111\u1ecf tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen b quy \u0111\u1ecbnh hoa tr\u1eafng; alen D quy \u0111\u1ecbnh qu\u1ea3 tr\u00f2n tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen d quy \u0111\u1ecbnh qu\u1ea3 d\u00e0i. Cho c\u00e2y th\u00e2n cao, hoa \u0111\u1ecf, qu\u1ea3 tr\u00f2n (P) t\u1ef1 th\u1ee5 ph\u1ea5n, thu \u0111\u01b0\u1ee3c F<\/p>\n

1<\/dd>\n

g\u1ed3m 301 c\u00e2y th\u00e2n cao, hoa \u0111\u1ecf, qu\u1ea3 d\u00e0i; 99 c\u00e2y th\u00e2n cao, hoa tr\u1eafng, qu\u1ea3 d\u00e0i; 600 c\u00e2y th\u00e2n cao, hoa \u0111\u1ecf, qu\u1ea3 tr\u00f2n; 199 c\u00e2y th\u00e2n cao, hoa tr\u1eafng, qu\u1ea3 tr\u00f2n; 301 c\u00e2y th\u00e2n th\u1ea5p, hoa \u0111\u1ecf, qu\u1ea3 tr\u00f2n; 100 c\u00e2y th\u00e2n th\u1ea5p, hoa tr\u1eafng, qu\u1ea3 tr\u00f2n. Bi\u1ebft r\u1eb1ng kh\u00f4ng x\u1ea3y ra \u0111\u1ed9t bi\u1ebfn, ki\u1ec3u gen c\u1ee7a (P) l\u00e0 <\/p>\n<\/div>\n

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A.<\/strong>Aa Bd \/bD<\/p>\n

B. <\/strong>AD\/ad Bb<\/p>\n

C.<\/strong>AB\/abDd<\/p>\n

D.<\/strong> Ad\/aDBb <\/p>\n<\/div>\n

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C\u00e2u 3<\/strong>:(ID:91205)<\/strong>H\u00ecnh b\u00ean ghi l\u1ea1i \u0111\u01b0\u1eddng cong t\u0103ng tr\u01b0\u1edfng c\u1ee7a c\u1ee7a qu\u1ea7n th\u1ec3 tr\u00f9ng \u0111\u1ebf gi\u00e0y \u0111\u01b0\u1ee3c nu\u00f4i trong ph\u00f2ng th\u00ed nghi\u1ec7m. Qu\u1ea7n th\u1ec3 n\u00e0y:<\/p>\n

A. <\/strong>c\u00f3 \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng ho\u00e0n to\u00e0n tho\u1ea3 m\u00e3n nhu c\u1ea7u c\u1ee7a c\u00e1c c\u00e1 th\u1ec3.<\/p>\n

B. <\/strong>c\u00f3 ngu\u1ed3n s\u1ed1ng d\u1ed3i d\u00e0o, kh\u00f4ng gian c\u01b0 tr\u00fa kh\u00f4ng gi\u1edbi h\u1ea1n<\/p>\n

C.<\/strong>t\u0103ng tr\u01b0\u1eddng theo ti\u1ec1m n\u0103ng sinh h\u1ecdc<\/p>\n

D.<\/strong>c\u00f3 \u0111i\u1ec1u s\u1ed1ng kh\u00f4ng ho\u00e0n to\u00e0n thu\u1eadn l\u1ee3i<\/p>\n

C\u00e2u 4:<\/strong>(ID:91206)<\/strong>M\u1ed9t gen \u1edf t\u1ebf b\u00e0o nh\u00e2n s\u01a1 c\u00f3 2400 nucl\u00ea\u00f4tit. Tr\u00ean m\u1ea1ch 1 c\u1ee7a gen, hi\u1ec7u s\u1ed1 t\u1ec9 l\u1ec7 % gi\u1eefa A v\u1edbi T b\u1eb1ng 20% s\u1ed1 nucl\u00ea\u00f4tit c\u1ee7a m\u1ea1ch. Tr\u00ean m\u1ea1ch 2 c\u00f3 s\u1ed1 nucl\u00ea\u00f4tit lo\u1ea1i A chi\u1ebfm 15% s\u1ed1 nucl\u00ea\u00f4tit c\u1ee7a m\u1ea1ch v\u00e0 b\u1eb1ng 1\/2 s\u1ed1 nucl\u00ea\u00f4tit c\u1ee7a G. Khi gen phi\u00ean m\u00e3 1 s\u1ed1 l\u1ea7n \u0111\u00e3 l\u1ea5y t\u1eeb m\u00f4i tr\u01b0\u1eddng n\u1ed9i b\u00e0o 540 Uraxin. S\u1ed1 l\u01b0\u1ee3ng nucl\u00ea\u00f4tit t\u1eebng lo\u1ea1i tr\u00ean mARN \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p t\u1eeb gen n\u00f3i tr\u00ean l\u00e0<\/p>\n

A.<\/strong>A = 180 ; U = 420 ; X = 240 ; G = 360.<\/p>\n

B.<\/strong>A= 180 ; U = 420 ; X = 360 ; G = 240.<\/p>\n

C.<\/strong>A = 420 ; U = 180 ; X = 360 ; G = 240<\/p>\n

D.<\/strong>A = 840 ; U = 360 ; X = 720 ; G = 480<\/p>\n

C\u00e2u<\/strong>5<\/strong>: (ID:91207)<\/strong>B\u1ec7nh Ph\u00eanink\u00eato ni\u1ec7u l\u00e0 b\u1ec7nh di truy\u1ec1n do m\u1ed9t \u0111\u1ed9t bi\u1ebfn gen l\u1eb7n n\u1eb1m tr\u00ean NST th\u01b0\u1eddng. Trong m\u1ed9t gia \u0111\u00ecnh, c\u1ea3 b\u1ed1 v\u00e0 m\u1eb9 \u0111\u1ec1u d\u1ecb h\u1ee3p t\u1eed v\u1ec1 b\u1ec7nh n\u00e0y. X\u00e1c su\u1ea5t \u0111\u1ec3 h\u1ecd sinh l\u1ea7n l\u01b0\u1ee3t 1 con trai b\u1ecb b\u1ec7nh, 1 con trai b\u00ecnh th\u01b0\u1eddng v\u00e0 1 con g\u00e1i b\u00ecnh th\u01b0\u1eddng l\u00e0 bao nhi\u00eau?<\/p>\n

A.<\/strong>56,25%.  B.<\/strong>1,7578%. C.<\/strong>18,75%.   D.<\/strong>14,0625%.<\/p>\n

C\u00e2u 6:<\/strong>(ID:91208)<\/strong>Trong qu\u00e1 tr\u00ecnh gi\u1ea3m ph\u00e2n c\u1ee7a m\u1ed9t t\u1ebf b\u00e0o sinh tinh \u1edf c\u01a1 th\u1ec3 c\u00f3 ki\u1ec3u gen AB\/ab \u0111\u00e3 x\u1ea3y ra ho\u00e1n v\u1ecb gen gi\u1eefa alen A v\u00e0 a.<\/strong>Cho bi\u1ebft kh\u00f4ng c\u00f3 \u0111\u1ed9t bi\u1ebfn x\u1ea3y ra.<\/strong>t\u00ednh theo l\u00fd thuy\u1ebft, s\u1ed1 lo\u1ea1i giao t\u1eed v\u00e0 t\u1ec9 l\u1ec7 t\u1eebng lo\u1ea1i giao t\u1eed \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb qu\u00e1 tr\u00ecnh gi\u1ea3m ph\u00e2n c\u1ee7a t\u1ebf b\u00e0o tr\u00ean l\u00e0<\/p>\n

A. <\/strong>4 lo\u1ea1i v\u1edbi t\u1ec9 l\u1ec7 1 : 1 : 1 : 1.<\/p>\n

B. <\/strong>2 lo\u1ea1i v\u1edbi t\u1ec9 l\u1ec7 1 : l<\/p>\n

.<\/dd>\n<\/p>\n

C.<\/strong>4 lo\u1ea1i v\u1edbi t\u1ec9 l\u1ec7 ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 ho\u00e1n v\u1ecb gen.<\/p>\n

D.<\/strong>2 lo\u1ea1i v\u1edbi t\u1ec9 l\u1ec7 ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 ho\u00e1n v\u1ecb gen.<\/p>\n

C\u00e2u 7<\/strong>:(ID:91209)<\/strong>Gen A c\u00f3 chi\u1ec1u d\u00e0i 2805A<\/p>\n

0<\/dd>\n

v\u00e0 2074 li\u00ean k\u1ebft H. Gen b\u1ecb \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec3m l\u00e0m gi\u1ea3m 3 li\u00ean k\u1ebft hi\u0111r\u00f4 th\u00e0nh genA<\/strong>.<\/strong>S\u1ed1 nucleotit m\u1ed7i lo\u1ea1i m\u00e0 m\u00f4i tr\u01b0\u1eddng cung c\u1ea5p cho c\u1eb7p gen Aa nh\u00e2n \u0111\u00f4i 3 l\u1ea7n l\u00e0 bao nhi\u00eau?<\/p>\n

A. <\/strong>A= T = 5635; G = X = 5915.   <\/p>\n

B. <\/strong>A= T = 2807; G= X = 2968.<\/p>\n

C. <\/strong>A = T = 2807; G=X = 2961.<\/p>\n

D. <\/strong>A= T = 5614; G=X = 5929<\/p>\n

C\u00e2u 8<\/strong>:ID:91210)<\/strong>C\u00e1c nh\u00e0 khoa h\u1ecdc Vi\u1ec7t Nam \u0111\u00e3 lai gi\u1ed1ng c\u00e2y d\u00e2u t\u1eb1m t\u1ee9 b\u1ed9i v\u1edbi gi\u1ed1ng c\u00e2y d\u00e2u t\u1eb1m l\u01b0\u1ee1ng b\u1ed9i t\u1ea1o gi\u1ed1ng c\u00e2y d\u00e2u t\u1eb1m tam b\u1ed9i d\u00f9ng cho ch\u0103n nu\u00f4i t\u1eb1m m\u00e0 kh\u00f4ng d\u00f9ng tr\u1ef1c ti\u1ebfp gi\u1ed1ng d\u00e2u t\u1eb1m t\u1ee9 b\u1ed9i v\u00ec<\/p>\n

A.<\/strong>gi\u1ed1ng tam b\u1ed9i th\u01b0\u1eddng h\u1eefu th\u1ee5 n\u00ean cho c\u1ea3 l\u00e1 v\u00e0 qu\u1ea3 mang l\u1ea1i hi\u1ec7u qu\u1ea3 kinh t\u1ebf cao h\u01a1n gi\u1ed1ng t\u1ee9 b\u1ed9i.<\/p>\n

B.<\/strong>gi\u1ed1ng tam b\u1ed9i c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu v\u1edbi \u0111i\u1ec1u ki\u1ec7n b\u1ea5t l\u1ee3i c\u1ee7a ngo\u1ea1i c\u1ea3nh cao h\u01a1n gi\u1ed1ng t\u1ee9 b\u1ed9i.<\/p>\n

C.<\/strong>gi\u1ed1ng tam b\u1ed9i th\u01b0\u1eddng b\u1ea5t th\u1ee5 n\u00ean c\u00f3 th\u1eddi gian sinh tr\u01b0\u1edfng d\u00e0i cho n\u0103ng su\u1ea5t l\u00e1 cao h\u01a1n gi\u1ed1ng t\u1ee9 b\u1ed9i.<\/p>\n

D.<\/strong>gi\u1ed1ng tam b\u1ed9i c\u00f3 k\u00edch th\u01b0\u1edbc c\u01a1 quan sinh d\u01b0\u1ee1ng l\u1edbn n\u00ean cho n\u0103ng su\u1ea5t l\u00e1 cao h\u01a1n gi\u1ed1ng t\u1ee9 b\u1ed9i.<\/p>\n

C\u00e2u 9<\/strong>:(ID:91211)<\/strong>Nhi\u1ec1u th\u1eed nghi\u1ec7m \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng tr\u00ed tu\u1ec7 c\u1ee7a con ng\u01b0\u1eddi. S\u1ef1 \u0111\u00e1nh gi\u00e1 d\u1ef1a v\u00e0o c\u00e1c tr\u1eafc nghi\u1ec7m v\u1edbi c\u00e1c b\u00e0i t\u1eadp c\u00f3 \u0111\u1ed9 kh\u00f3 t\u0103ng d\u1ea7n th\u00f4ng qua c\u00e1c h\u00ecnh v\u1ebd, c\u00e1c con s\u1ed1 v\u00e0 c\u00e1c c\u00e2u h\u1ecfi. Ch\u1ec9 s\u1ed1 IQ \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng<\/p>\n

A. <\/strong>t\u1ed5ng trung b\u00ecnh c\u1ee7a c\u00e1c l\u1eddi gi\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh th\u1ed1ng k\u00ea theo tu\u1ed5i tr\u00ed tu\u1ec7 chia cho tu\u1ed5i kh\u00f4n v\u00e0 nh\u00e2n 100<\/p>\n

B. <\/strong>t\u1ed5ng trung b\u00ecnh c\u1ee7a c\u00e1c l\u1eddi gi\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh th\u1ed1ng k\u00ea theo tu\u1ed5i kh\u00f4n chia cho tu\u1ed5i sinh h\u1ecdc v\u00e0 nh\u00e2n 100<\/p>\n

C. <\/strong> t\u1ed5ng trung b\u00ecnh c\u1ee7a c\u00e1c l\u1eddi gi\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh th\u1ed1ng k\u00ea theo tu\u1ed5i kh\u00f4n chia cho tu\u1ed5i tr\u00ed tu\u1ec7 v\u00e0 nh\u00e2n 100<\/p>\n

D. <\/strong>t\u00f4ng trung b\u00ecnh c\u1ee7a c\u00e1c l\u1eddi gi\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh th\u00f4ng k\u00ea theo tu\u1ed5i sinh h\u1ecdc chia cho tu\u1ed5i kh\u00f4n v\u00e0 nh\u00e2n v\u1edbi 100<\/p>\n

C\u00e2u 10:<\/strong>(ID:91212)<\/strong>Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0o sau \u0111\u00e2y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng l\u1ea1i t\u1ed5?<\/p>\n

A.<\/strong>ng\u01b0\u1eddi c\u00f3 3 \u0111\u1ebfn 4 \u0111\u00f4i v\u00fa.             <\/p>\n

B.<\/strong>ph\u00f4i ng\u01b0\u1eddi giai \u0111o\u1ea1n 5 th\u00e1ng c\u00f3 \u0111u\u00f4i,<\/p>\n

C.<\/strong>ngu\u1eddi \u0111i xa tr\u1edf v\u1ec1 th\u0103m qu\u00ea h\u01b0\u01a1ng, t\u1ed3 ti\u00ean.<\/p>\n

D.<\/strong>ng\u01b0\u1eddi c\u00f3 ru\u1ed9t th\u1eeba v\u00e0 n\u1ebfp th\u1ecbt \u1edf kho\u00e9 m\u1eaft.<\/p>\n

C\u00e2u 11<\/strong>:(ID:91213)<\/strong>Cho c\u00e1c ph\u01b0\u01a1ng ph\u00e1p sau:<\/p>\n

Trong c\u00e1c ph\u01b0\u01a1ng ph\u00e1p k\u1ec3 tr\u00ean c\u00f3 m\u1ea5y ph\u01b0\u01a1ng ph\u00e1p t\u1ea1o gi\u1ed1ng m\u1edbi?<\/p>\n<\/div>\n

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A.<\/strong>5         <\/p>\n

B.<\/strong>6.         <\/p>\n

C.<\/strong>3.         <\/p>\n

D.<\/strong>4. <\/p>\n<\/div>\n

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C\u00e2u 12:<\/strong>(ID:91214)<\/strong>Ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng d\u1ea1ng \u0111\u1ed9t bi\u1ebfn c\u1ea5u tr\u00fac n\u00e0o sau \u0111\u00e2y \u0111\u1ec3 lo\u1ea1i b\u1ecf nh\u1eefng gen kh\u00f4ng mong mu\u1ed1n ra kh\u1ecfi nhi\u1ec5m s\u1eafc th\u1ec3?<\/p>\n

A. <\/strong>\u0110\u1ed9t bi\u1ebfn chuy\u1ec3n \u0111o\u1ea1n nhi\u1ec5m s\u1eafc th\u1ec3.        <\/p>\n

B. <\/strong>\u0110\u1ed9t bi\u1ebfn m\u1ea5t \u0111o\u1ea1n nhi\u1ec5m s\u1eafc th\u1ec3.<\/p>\n

C. <\/strong>\u0110\u1ed9t bi\u1ebfn \u0111\u1ea3o \u0111o\u1ea1n nhi\u1ec5m s\u1ea5c th\u1ec3<\/p>\n

D. <\/strong> \u0110\u1ed9t bi\u1ebfn l\u1eb7p \u0111o\u1ea1n nhi\u1ec5m s\u1eafc th\u1ec3.<\/p>\n

C\u00e2u 13:<\/strong>(ID:91215)<\/strong>N\u1ed9i dung n\u00e0o kh\u00f4ng \u0111\u00fang v\u1edbi quy lu\u1eadt ph\u00e2n ly?<\/p>\n

A.<\/strong>m\u1ed7i t\u00ednh tr\u1ea1ng \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh b\u1edfi m\u1ed9t c\u1eb7p alen.<\/p>\n

B.<\/strong>khi gi\u1ea3m ph\u00e2n c\u1eb7p nh\u00e2n t\u1ed1 di truy\u1ec1n ph\u00e2n ly \u0111\u1ed3ng \u0111\u1ec1u v\u1ec1 c\u00e1c giao t\u1eed.<\/p>\n

C.<\/strong>c\u00e1c c\u1eb7p alen ph\u00e2n ly \u0111\u1ed9c l\u1eadp v\u00e0 t\u1ed5 h\u1ee3p t\u1ef1 do trong qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh giao t\u1eed.<\/p>\n

D.<\/strong>s\u1ef1 ph\u00e2n ly c\u1ee7a c\u1eb7p NST t\u01b0\u01a1ng \u0111\u1ed3ng d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e2n ly c\u1ee7a c\u1eb7p alen t\u01b0\u01a1ng \u1ee9ng.<\/p>\n

C\u00e2u 14<\/strong>:(ID:91216)<\/strong>Trong m\u1ed9t ph\u00e9p lai ph\u00e2n t\u00edch gi\u1eefa c\u00e2y ng\u00f4 d\u1ecb h\u1ee3p t\u1eed v\u1ec1 3 gen v\u1edbi c\u00e2y \u0111\u1ed3ng h\u1ee3p t\u1eed l\u1eb7n v\u1ec1 3 gen \u0111\u00f3, thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 sau:A-B-C-: 113 c\u00e2y; aabbcc: 105 c\u00e2y; A-B-cc: 70 c\u00e2y; aabbC-: 64 c\u00e2y; A-bbcc: 17 c\u00e2y; aaB-C-:21 c\u00e2y.Tr\u1eadt t\u1ef1 ph\u00e2n b\u1ed1 3 gen v\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c gen l\u00e0<\/p>\n

A.<\/strong>BAC; AB-9,7; BC-34,4.             B.<\/strong>ABC; AB-9,7; BC-34,4.<\/p>\n

C.<\/strong>BAC; AB- 34,4; BC-9,7<\/p>\n

.<\/dd>\n

              D.<\/strong>ABC; AB-34,4; BC-9,7.<\/p>\n

C\u00e2u 1<\/strong>5<\/strong>:<\/strong>(ID:91217)<\/strong>Qu\u1ea7n th\u1ec3 (Q) t\u1ef1 th\u1ee5 ph\u1ea5n qua 2 th\u1ebf h\u1ec7 t\u1ea1o n\u00ean qu\u1ea7n th\u1ec3 (Q<\/p>\n

2<\/dd>\n

) c\u00f3 th\u00e0nh ph\u1ea7n ki\u1ec3u gen l\u00e0 0,525AA:0,15Aa:0,325aa.<\/strong>Bi\u1ebft r\u1eb1ng qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c nh\u00e2n t\u1ed1 ti\u1ebfn h\u00f3a kh\u00e1c.<\/strong>Th\u00e0nh ph\u1ea7n ki\u1ec3u gen c\u1ee7a qu\u1ea7n th\u1ec3 (Q) l\u00e0: <\/p>\n<\/div>\n

\n

A.<\/strong>0,35AA:0,6Aa:0,05aa       <\/p>\n

B.<\/strong>0,1AA:0,6Aa:0,3aa.<\/strong><\/p>\n

C.<\/strong>0,3AA:0,6Aa:0,laa.<\/strong>                 <\/p>\n

D.<\/strong>0,05AA:0,6Aa:0,35aa.<\/strong> <\/p>\n<\/div>\n

\n

C\u00e2u 16:<\/strong>(ID:91218)<\/strong>Cho c\u00e1 th\u1ec3 m\u1eaft \u0111\u1ecf thu\u1ea7n ch\u1ee7ng lai v\u1edbi c\u00e1 th\u1ec3 m\u1eaft tr\u1eafng \u0111\u01b0\u1ee3c F<\/p>\n

1<\/dd>\n

\u0111\u1ec1u m\u1eaft \u0111\u1ecf. Cho con c\u00e1i F<\/p>\n

1<\/dd>\n

lai ph\u00e2n t\u00edch v\u1edbi \u0111\u1ef1c m\u1eaft tr\u1eafng thu \u0111\u01b0\u1ee3c t\u1ec9 l\u1ec7 3 m\u1eaft tr\u1eafng: 1 m\u1eaft \u0111\u1ecf, trong \u0111\u00f3 m\u1eaft \u0111\u1ecf \u0111\u1ec1u l\u00e0 con \u0111\u1ef1c.<\/strong>K\u1ebft lu\u1eadn n\u00e0o sau l\u00e0 \u0111\u00fang<\/p>\n

A.<\/strong>M\u00e0u m\u1eaft di truy\u1ec1n tr\u1ed9i l\u1eb7n ho\u00e0n to\u00e0n P  \u2640X<\/p>\n

A<\/dd>\n

X<\/p>\n

A<\/dd>\n

x<\/dd>\n

\u2642X<\/p>\n

a<\/dd>\n

Y<\/p>\n

B.<\/strong>M\u00e0u m\u1eaft di truy\u1ec1n theo tr\u1ed9i ho\u00e0n to\u00e0n. P: \u2640X<\/p>\n

A<\/dd>\n

X<\/p>\n

A<\/dd>\n

X<\/dd>\n

\u2642 X<\/p>\n

a<\/dd>\n

Y.<\/p>\n

C.<\/strong>M\u00e0u m\u1eaft di truy\u1ec1n theo t\u01b0\u01a1ng t\u00e1c b\u1ed5 sung. P: \u2640AAX<\/p>\n

B<\/dd>\n

X<\/p>\n

b<\/dd>\n

X<\/dd>\n

\u2642 aaX<\/p>\n

b<\/dd>\n

Y.<\/p>\n

D.<\/strong>M\u00e0u m\u1eaft di truy\u1ec1n theo t\u01b0\u01a1ng t\u00e1c b\u1ed5 sung. \u2642 P: AAX<\/p>\n

B<\/dd>\n

X<\/p>\n

B<\/dd>\n

X<\/dd>\n

  \u2640aaX<\/p>\n

b<\/dd>\n

Y.<\/p>\n

C\u00e2u 17<\/strong>:(ID:91219)<\/strong>T\u1eeb qu\u1ea7n th\u1ec3 c\u00e2y 2n, ng\u01b0\u1eddi ta t\u1ea1o \u0111\u01b0\u1ee3c qu\u1ea7n th\u1ec3 c\u00e2y 4n, c\u00f3 th\u1ec3 xem qu\u1ea7n th\u1ec3 c\u00e2y 4n l\u00e0 m\u1ed9t lo\u00e0i m\u1edbi v\u00ec qu\u1ea7n th\u1ec3 c\u00e2y 4n<\/p>\n

A.  <\/strong>c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1edbi qu\u1ea7n th\u1ec3 c\u00e2y 2n v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng nhi\u1ec5m s\u1eafc th\u1ec3<\/p>\n

B.   <\/strong>khi giao ph\u1ea5n v\u1edbi qu\u1ea7n th\u1ec3 c\u00e2v 2n cho ra con lai b\u1ea5t th\u1ee5.<\/p>\n

C.  <\/strong>C\u00f3 \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u1ea3i kh\u00e1c h\u1eb3n qu\u1ea7n th\u1ec3 c\u00e2y 2n.<\/p>\n

D.<\/strong>kh\u00f4ng th\u1ec3 giao ph\u1ea5n v\u1edbi qu\u1ea7n th\u1ec3 c\u00e2y 2n.<\/p>\n

C\u00e2u 18:<\/strong>(ID:91220)<\/strong>Theo qui lu\u1eadt di truy\u1ec1n ph\u00e2n ly \u0111\u1ed9c l\u1eadp, v\u1edbi c\u00e1c gen tr\u1ed9i l\u1eb7n ho\u00e0n to\u00e0n. N\u1ebfu P thu\u1ea7n ch\u1ee7ng kh\u00e1c nhau b\u1edfi n c\u1eb7p t\u00ednh tr\u1ea1ng t\u01b0\u01a1ng ph\u1ea3n th\u00ec s\u1ed1 l\u01b0\u1ee3ng ki\u1ec3u gen c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1ed1i \u0111a \u1edf F<\/p>\n

2<\/dd>\n

l\u00e0<\/p>\n<\/div>\n

\n

A.<\/strong>5<\/p>\n

B.<\/strong>2<\/p>\n

n<\/dd>\n<\/p>\n

C.<\/strong>4<\/p>\n

n<\/dd>\n

 <\/p>\n

D.<\/strong>3<\/p>\n

n<\/dd>\n

.<\/p>\n<\/div>\n

\n

C\u00e2u 19<\/strong>:(ID:91221)<\/strong>\u1edf m\u1ed9t lo\u00e0i th\u00fa, x\u00e9t m\u1ed9t gen c\u00f3 2 alen A v\u00e0 a n\u1eb1m tr\u00ean NST gi\u1edbi t\u00ednh X. Bi\u1ebft r\u1eb1ng qu\u1ea7n th\u1ec3 kh\u1edfi \u0111\u1ea7u c\u00f3 t\u1ec9 l\u1ec7 c\u00e1c ki\u1ec3u gen l\u00e0 0,7X<\/p>\n

A<\/dd>\n

Y : 0,3X<\/p>\n

a<\/dd>\n

Y \u1edf gi\u1edbi \u0111\u1ef1c v\u00e0 0,4 X<\/p>\n

A<\/dd>\n

X<\/p>\n

A<\/dd>\n

: 0,4 X<\/p>\n

A<\/dd>\n

X<\/p>\n

a<\/dd>\n

: 0,2 X<\/p>\n

a<\/dd>\n

X<\/p>\n

a<\/dd>\n

gi\u1edbi c\u00e1i. T\u1ea7n s\u1ed1 X<\/p>\n

A<\/dd>\n

v\u00e0 X<\/p>\n

a<\/dd>\n

trong gi\u1edbi \u0111\u1ef1c c\u1ee7a qu\u1ea7n th\u1ec3 sau m\u1ed9t th\u1ebf h\u1ec7 ng\u1eabu ph\u1ed1i l\u1ea7n l\u01b0\u1ee3t l\u00e0<\/p>\n

A.<\/strong>0,6 v\u00e0 0,4.        B.<\/strong>0,4 v\u00e0 0,6.       C.<\/strong>0,35 v\u00e0 0,65.           D.<\/strong>0,65 v\u00e0 0,35.<\/p>\n

C\u00e2u 20<\/strong>:(ID:91222)<\/strong>\u1ede c\u00e0 chua, alen A quy \u0111\u1ecbnh qu\u1ea3 \u0111\u1ecf tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen a quy \u0111\u1ecbnh qu\u1ea3 v\u00e0ng, alen B quy \u0111\u1ecbnh th\u00e2n cao tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi a quy \u0111\u1ecbnh th\u00e2n th\u1ea5p. Cho giao ph\u1ed1i c\u00e2y l\u01b0\u1ee1ng b\u1ed9i thu\u1ea7n ch\u1ee7ng kh\u00e1c nhau v\u1ec1 hai t\u00ednh tr\u1ea1ng tr\u00ean thu \u0111\u01b0\u1ee3c F<\/p>\n

1<\/dd>\n

. X\u1eed l\u00ed c\u00f4nsixin v\u1edbi c\u00e1c c\u00e2y F<\/p>\n

1<\/dd>\n

sau \u0111\u00f3 cho 2 c\u00e2y F<\/p>\n

1<\/dd>\n

giao ph\u1ea5n v\u1edbi nhau thu \u0111\u01b0\u1ee3c \u0111\u1eddi con F<\/p>\n

2<\/dd>\n

c\u00f3 ki\u1ec3u h\u00ecnh ph\u00e2n li theo t\u1ec9 l\u1ec7 121 : 11 :11 : 1. C\u00e1c ph\u00e9p lai c\u00f3 th\u1ec3 cho k\u1ebft qu\u1ea3 tr\u00ean g\u1ed3m: <\/p>\n<\/div>\n

\n

1. AAaaBBbb<\/p>\n

X<\/dd>\n

AaBb.<\/strong><\/p>\n

2. AAaaBb<\/p>\n

X<\/dd>\n

AaBBbb.<\/strong><\/p>\n

3. AaBbbb x AAaaBBbb.<\/strong><\/p>\n

4<\/p>\n

.<\/dd>\n

AAaaBBbb<\/p>\n

X<\/dd>\n

AaaaBbbb.<\/strong><\/p>\n

5. AaaaBBbb<\/p>\n

X<\/dd>\n

AAaaBb.<\/strong><\/p>\n

6. AaBBbb<\/p>\n

X<\/dd>\n

AAaaBbbb.<\/strong> <\/p>\n<\/div>\n

\n

C\u00f3 m\u1ea5y tr\u01b0\u1eddng h\u1ee3p m\u00e0 c\u1eb7p b\u1ed1 m\u1eb9 F<\/p>\n

1<\/dd>\n

kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi k\u1ebft qu\u1ea3 F<\/p>\n

2<\/dd>\n

? <\/p>\n<\/div>\n

\n

A.<\/strong>3 <\/p>\n

B.<\/strong>5.<\/p>\n

C.<\/strong>4.<\/p>\n

D.<\/strong>2. <\/p>\n<\/div>\n

\n

C\u00e2u 21:<\/strong>(ID:91223)<\/strong>Nh\u1eefng c\u01a1 th\u1ec3 sinh v\u1eadt trong \u0111\u00f3 c\u00f3 b\u1ed9 nhi\u1ec5m s\u1eafc th\u1ec3 trong nh\u00e2n c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c t\u1ebf b\u00e0o \u0111\u1ec1u ch\u1ee9a s\u1ed1 l\u01b0\u1ee3ng nhi\u1ec5m s\u1eafc th\u1ec3 c\u1ee7a hai lo\u00e0i kh\u00e1c nhau \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0<\/p>\n

A. th\u1ec3 l\u1ec7ch b\u1ed9i         B. th\u1ec3 \u0111a b\u1ed9i       C. th\u1ec3 t\u1ef1 \u0111a b\u1ed9i.     D. th\u1ec3 d\u1ecb \u0111a b\u1ed9i.<\/p>\n

C\u00e2u 22<\/strong>:(ID:91224)<\/strong>M\u1ed9t \u0111o\u1ea1n p\u00f4lipeptit g\u1ed3m 4 axit amin c\u00f3 tr\u00ecnh t\u1ef1: Val – Trp – Lys- Pro. Bi\u1ebft r\u1eb1ng c\u00e1c c\u00f4\u0111on m\u00e3 h\u00f3a c\u00e1c axit amin t\u01b0\u01a1ng \u1ee9ng nh\u01b0 sau: Trp – UGG ; Val – GUU; Lys – AAG ; Pro – XXA.<\/strong>\u0110o\u1ea1n m\u1ea1ch g\u1ed1c c\u1ee7a gen mang th\u00f4ng tin m\u00e3 h\u00f3a cho \u0111o\u1ea1n p\u00f4lipeptit n\u00f3i tr\u00ean c\u00f3 tr\u00ecnh t\u1ef1 nucl\u00ea\u00f4tit l\u00e0<\/p>\n

A.<\/strong>5\u2019 TGG -XTT – XXA – AAX 3\u2019         B.<\/strong>5\u2019 XAA- AXX – TTX–<\/strong>GGT 3\u2019<\/p>\n

C.<\/strong>5\u2019 GTT – TGG – AAG – XXA 3\u2019.  D.<\/strong>5\u2019 GUU – UGG- AAG – XXA 3\u2019<\/p>\n

C\u00e2u 23:<\/strong>(ID:91225)<\/strong>Trong c\u1ea5u tr\u00fac tu\u1ed5i c\u1ee7a qu\u1ea7n th\u1ec3, tu\u1ed5i sinh th\u00e1i \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0<\/p>\n

C.<\/strong>tu\u1ed5i c\u00f3 kh\u1ea3 n\u0103ng sinh s\u1ea3n trong qu\u1ea7n th\u1ec3<\/p>\n

D.<\/strong>tu\u1ed5i c\u00f3 kh\u1ea3 n\u0103ng sinh s\u1ea3n trong qu\u1ea7n th\u1ec3<\/p>\n

C\u00e2u 24<\/strong>:(ID:91226)<\/strong>\u1ede m\u1ed9t qu\u1ea7n th\u1ec3 ng\u1eabu ph\u1ed1i, x\u00e9t 4 gen: gen th\u1ee9 nh\u1ea5t v\u00e0 gen th\u1ee9 hai \u0111\u1ec1u c\u00f3 2 alen, n\u1eb1m tr\u00ean \u0111o\u1ea1n kh\u00f4ng t\u01b0\u01a1ng \u0111\u1ed3ng c\u1ee7a nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1edbi t\u00ednh X; gen th\u1ee9 ba c\u00f3 4 alen n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 th\u01b0\u1eddng; gen th\u1ee9 t\u01b0 c\u00f3 3 alen n\u1eb1m tr\u00ean \u0111o\u1ea1n t\u01b0\u01a1ng \u0111\u1ed3ng c\u1ee7a nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1edbi t\u00ednh X v\u00e0 Y. Trong tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng x\u1ea3y ra \u0111\u1ed9t bi\u1ebfn, s\u1ed1 lo\u1ea1i ki\u1ec3u gen t\u1ed1i \u0111a v\u1ec1 c\u1ea3 b\u1ed1n gen tr\u00ean c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra trong qu\u1ea7n th\u1ec3 n\u00e0y l\u00e0<\/p>\n

A.<\/strong>1140.        B.<\/strong>360.        C.<\/strong>870.       D.<\/strong>2250.<\/p>\n

C\u00e2u 25<\/strong>:(ID:91227)<\/strong>\u00dd ngh\u0129a sinh th\u00e1i c\u1ee7a ph\u00e2n b\u1ed1 theo nh\u00f3m l\u00e0<\/p>\n

A.  <\/strong>l\u00e0m gi\u1ea3m m\u1ee9c \u0111\u1ed9 c\u1ea1nh tranh gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 duy tr\u00ec m\u1eadt \u0111\u1ed9 qu\u1ea7n th\u1ec3 th\u00edch h\u1ee3p.<\/p>\n

D.<\/strong>l\u00e0m t\u0103ng m\u1ee9c \u0111\u1ed9 c\u1ea1nh tranh gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 t\u00f4n t\u1ea1i c\u1ee7a nh\u1eefng c\u00e1 th\u1ec3 kh\u1ecfe m\u1ea1nh nh\u1ea5t.<\/p>\n

C.<\/strong>gi\u00fap c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 t\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c ngu\u1ed3n s\u1ed1ng ti\u1ec1m t\u00e0ng trong m\u00f4i tr\u01b0\u1eddng.<\/p>\n

D.<\/strong>l\u00e0m t\u0103ng s\u1ef1 h\u1ed7 tr\u1ee3 l\u1eabn nhau c\u00e1c c\u00e1 th\u1ec3 ch\u1ed5ng l\u1ea1i \u0111i\u00eau ki\u1ec7n b\u1ea5t l\u1ee3i c\u1ee7a m\u00f4i tr\u01b0\u1eddng s\u1ed1ng \u0111\u1ea3m b\u1ea3o s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n

C\u00e2u 26<\/strong>:(ID:91228)<\/strong>Nh\u1eadn x\u00e9t n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang v\u1edbi c\u1ea5u tr\u00fac \u00f4p\u00earon Lac \u1edf vi khu\u1ea9n \u0111\u01b0\u1eddng ru\u1ed9t(E.co<\/strong>l<\/strong>i)<\/strong><\/p>\n

D.<\/strong>Khi m\u00f4i tr\u01b0\u1eddng c\u00f3 lact\u00f4z\u01a1 v\u00e0 kh\u00f4ng c\u00f3 lact\u00f4z\u01a1, gen R \u0111\u1ec1u t\u1ed5ng h\u1ee3p pr\u00f4t\u00eain \u1ee9c ch\u1ebf \u0111\u1ec3 \u0111i\u1ec1u h\u00f2a ho\u1ea1t \u0111\u1ed9ng c\u1ee7a op\u00earon Lac<\/p>\n

C\u00e2u 27<\/strong>:(ID:91229)<\/strong>Qu\u1ea7n th\u1ec3 n\u00e0o sau \u0111\u00e2y \u0111\u1ea1t tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng di truy\u1ec1n?<\/p>\n

A.<\/strong>0,4852 AA : 2802 Aa : 0,2346aa.<\/strong>         B.<\/strong>0,22 AA : 0,52 Aa : 0,26 aa.<\/strong><\/p>\n

C.<\/strong>45 AA : 510 Aa : 1445 aa.<\/strong>            D.<\/strong>22 AA : 86 Aa : 72aa.<\/strong><\/p>\n

C\u00e2u 28:<\/strong>(ID:91230)<\/strong>\u1edf ru\u1ed3i gi\u1ea5m, alen A quy \u0111\u1ecbnh th\u00e2n x\u00e1m tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen a quy \u0111\u1ecbnh th\u00e2n \u0111en, alen B quy \u0111\u1ecbnh c\u00e1nh d\u00e0i tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen b quy \u0111\u1ecbnh c\u00e1nh c\u1ee5t. C\u00e1c gen quy \u0111\u1ecbnh m\u00e0u th\u00e2n v\u00e0 h\u00ecnh d\u1ea1ng c\u00e1nh \u0111\u1ec1u n\u1eb1m tr\u00ean m\u1ed9t nhi\u1ec5m s\u1eafc th\u1ec3 th\u01b0\u1eddng. Alen D quy \u0111\u1ecbnh m\u1eaft \u0111\u1ecf tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen d quy \u0111\u1ecbnh m\u1eaft tr\u1eafng n\u1eb1m tr\u00ean \u0111o\u1ea1n kh\u00f4ng t\u01b0\u01a1ng \u0111\u1ed3ng c\u1ee7a nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1edbi t\u00ednh X. Cho giao ph\u1ed1i ru\u1ed3i c\u00e1i th\u00e2n x\u00e1m, c\u00e1nh d\u00e0i, m\u1eaft \u0111\u1ecf v\u1edbi ru\u1ed3i \u0111\u1ef1c th\u00e2n \u0111en, c\u00e1nh c\u1ee5t, m\u1eaft \u0111\u1ecf  trong t\u1ed5ng s\u1ed1 c\u00e1c ru\u1ed3i thu \u0111\u01b0\u1ee3c \u1edf F<\/p>\n

l<\/dd>\n

, ru\u1ed3i c\u00f3 ki\u1ec3u h\u00ecnh th\u00e2n x\u00e1m, c\u00e1nh d\u00e0i, m\u1eaft tr\u1eafng chi\u1ebfm t\u1ec9 l\u1ec7 1%. T\u00ednh theo l\u00ed thuy\u1ebft, t\u1ec9 l\u1ec7 ru\u1ed3i F<\/p>\n

1<\/dd>\n

c\u00f3 ki\u1ec3u h\u00ecnh th\u00e2n x\u00e1m, c\u00e1nh c\u1ee5t, m\u1eaft \u0111\u1ecf l\u00e0<\/p>\n

A.<\/strong>3%.           B.<\/strong>34,5%.         C.<\/strong>50%.          D.<\/strong>11,5%.<\/p>\n

C\u00e2u 29:<\/strong>(ID:91231)<\/strong>\u1ede m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt, t\u00ednh tr\u1ea1ng h\u00ecnh d\u1ea1ng qu\u1ea3 do hai gen kh\u00f4ng alen ph\u00e2n li \u0111\u1ed9c l\u1eadp c\u00f9ng quy \u0111\u1ecbnh.Khi trong ki\u1ec3u gen c\u00f3 m\u1eb7t \u0111\u1ed3ng th\u1eddi c\u1ea3 hai alen tr\u1ed9i A v\u00e0 B cho qu\u1ea3 d\u1eb9t, khi ch\u1ec9 c\u00f3 m\u1ed9t trong hai alen tr\u1ed9i cho qu\u1ea3 tr\u00f2n v\u00e0 khi kh\u00f4ng c\u1ecf alen tr\u1ed9i n\u00e0o cho qu\u1ea3 d\u00e0i. T\u00ednh tr\u1ea1ng m\u00e0u s\u1eafc hoa do m\u1ed9t gen c\u00f3 2 alen quy \u0111\u1ecbnh, alen D quy \u0111\u1ecbnh hoa \u0111\u1ecf tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen d quy \u0111\u1ecbnh hoa tr\u1eafng. Cho c\u00e2y qu\u1ea3 d\u1eb9t, hoa \u0111\u1ecf (P) t\u1ef1 th\u1ee5 ph\u1ea5n, thu \u0111\u01b0\u1ee3c F<\/p>\n

1<\/dd>\n

c\u00f3 ki\u1ec3u h\u00ecnh ph\u00e2n li theo t\u1ec9 l\u1ec7 6 c\u00e2y qu\u1ea3 d\u1eb9t, hoa \u0111\u1ecf: 5 c\u00e2y qu\u1ea3 tr\u00f2n, hoa \u0111\u1ecf: 3 c\u00e2y qu\u1ea3 d\u1eb9t, hoa tr\u1eafng: 1 c\u00e2y qu\u1ea3 tr\u00f2n, hoa tr\u1eafng: 1 c\u00e2y qu\u1ea3 d\u00e0i. hoa \u0111\u1ecf. Bi\u1ebft r\u1eb1ng kh\u00f4ng x\u1ea3y ra \u0111\u1ed9t bi\u1ebfn, ki\u1ec3u gen n\u00e0o c\u1ee7a (P) sau \u0111\u00e2y ph\u00f9 h\u1ee3p v\u1edbi k\u1ebft qu\u1ea3 tr\u00ean? <\/p>\n<\/div>\n

\n

A.<\/strong>Ad\/aDBb<\/p>\n

B.<\/strong>BD\/bdAa<\/p>\n

C.<\/strong>Ad\/ADBB<\/p>\n

D.<\/strong>AD\/adBb <\/p>\n<\/div>\n

\n

C\u00e2u 30<\/strong>:(ID:91232)<\/strong>\u1ede \u0111\u1eadu H\u00e0 Lan, cho bi\u1ebft A quy \u0111\u1ecbnh h\u1ea1t m\u00e0u v\u00e0ng, a quy \u0111\u1ecbnh h\u1ea1t m\u00e0u xanh; B quy \u0111\u1ecbnh h\u1ea1t v\u1ecf tr\u01a1n, b quy \u0111\u1ecbnh h\u1ea1t v\u1ecf nh\u0103n. Qu\u1ea7n th\u1ec3 ban \u0111\u1ea7u c\u00f3 16% c\u00e2y h\u1ea1t nh\u0103n, trong s\u1ed1 \u0111\u00f3 c\u00e2y h\u1ea1t xanh – v\u1ecf nh\u0103n chi\u1ebfm t\u1ef7 l\u1ec7 9%. Gi\u1ea3 s\u1eed qu\u1ea7n th\u1ec3 kh\u00f4ng ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c nh\u00e2n t\u1ed1 ti\u1ebfn h\u00f3a, t\u00ednh theo l\u00fd thuy\u1ebft, t\u1ef7 l\u1ec7 c\u00e2y h\u1ea1t v\u00e0ng – v\u1ecf tr\u01a1n thu\u1ea7n ch\u1ee7ng trong qu\u1ea7n th\u1ec3 l\u00e0<\/p>\n

A.<\/strong>15,12%.   B.<\/strong>76,47%.   C.<\/strong>23,74%.   D.<\/strong>17,64%.<\/p>\n

C\u00e2u 31:<\/strong>(ID:91233)<\/strong>Nhi\u1ec1u lo\u1ea1i b\u1ec7nh ung th\u01b0 xu\u1ea5t hi\u1ec7n l\u00e0 do gen ti\u1ec1n ung th\u01b0 ho\u1ea1t \u0111\u1ed9ng qu\u00e1 m\u1ee9c t\u1ea1o ra qu\u00e1 nhi\u1ec1u s\u1ea3n ph\u1ea9m c\u1ee7a gen. Ki\u1ec3u \u0111\u1ed9t bi\u1ebfn n\u00e0o d\u01b0\u1edbi \u0111\u00e2y kh\u00f4ng gi\u1ea3i th\u00edch cho c\u01a1 ch\u1ebf g\u00e2y b\u1ec7nh ung th\u01b0 \u1edf tr\u00ean?<\/p>\n

C.<\/strong>\u0110\u1ed9t bi\u1ebfn \u1edf v\u00f9ng m\u00e3 ho\u00e1 c\u1ee7a gen ti\u1ec1n ung th\u01b0 l\u00e0m thay \u0111\u1ed5i c\u1ea5u tr\u00fac ch\u1ee9c n\u0103ng c\u1ee7a ph\u00e2n t\u1eed pr\u00f4t\u00eain do gen m\u00e3 ho\u00e1.<\/p>\n

D.<\/strong>\u0110\u1ed9t bi\u1ebfn l\u1eb7p \u0111o\u1ea1n l\u00e0m xu\u1ea5t hi\u1ec7n nhi\u1ec1u b\u1ea3n sao c\u1ee7a gen ti\u1ec1n ung th\u01b0 l\u00e0m t\u0103ng m\u1ee9c \u0111\u1ed9 bi\u1ec3u hi\u1ec7n c\u1ee7a gen.<\/p>\n

C\u00e2u 32:<\/strong>(ID:91234)<\/strong>S\u1ef1 ph\u00e2n b\u1ed1 c\u1ee7a m\u1ed9t lo\u00e0i sinh v\u1eadt trong qu\u1ea7n x\u00e3 t\u1ef1 nhi\u00ean th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c ch\u1ee7 y\u1ebfu v\u00e0o<\/p>\n

A.  <\/strong>nhu c\u1ea7u v\u1ec1 ngu\u1ed3n s\u1ed1ng c\u1ee7a lo\u00e0i<\/p>\n

B.  <\/strong>s\u1ef1 ph\u00e2n b\u1ed1 c\u1ee7a lo\u00e0i \u1edf b\u1eadc dinh d\u01b0\u1ee1ng li\u1ec1n k\u1ec1.<\/p>\n

C.  <\/strong>ho\u1ea1t \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n

D.<\/strong>di\u1ec7n t\u00edch c\u1ee7a qu\u1ea7n x\u00e3.<\/p>\n

C\u00e2u 33:<\/strong>(ID:91235)<\/strong>K\u1ebft qu\u1ea3 c\u1ee7a ch\u1ecdn l\u1ecdc qu\u1ea7n th\u1ec3 l\u00e0<\/p>\n

A.<\/strong>H\u00ecnh th\u00e0nh nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m th\u00edch nghi t\u01b0\u01a1ng quan gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 v\u1ec1 m\u1eb7t ki\u1ebfm \u0103n t\u1ef1 v\u1ec7, sinh s\u1ea3n, \u0111\u1ea3m b\u1ea3o s\u1ef1 t\u1ed3n t\u1ea1i ph\u00e1t tri\u1ec3n c\u1ee7a nh\u1eefng qu\u1ea7n th\u1ec3 th\u00edch nghi nh\u1ea5t.<\/p>\n

B.<\/strong>l\u00e0m t\u1ea7n s\u1ed1 t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a c\u00e1c alen trong qu\u1ea7n th\u1ec3 bi\u1ebfn \u0111\u1ed5i m\u1ed9t c\u00e1ch \u0111\u1ed9t ng\u1ed9t,<\/p>\n

C.<\/strong>l\u00e0m t\u0103ng t\u1ec9 l\u1ec7 nh\u1eefng c\u00e1 th\u1ec3 th\u00edch nghi h\u01a1n trong n\u1ed9i b\u1ed9 qu\u1ea7n th\u1ec3, l\u00e0m ph\u00e2n ho\u00e1 kh\u1ea3 n\u0103ng s\u1ed1ng s\u00f3t v\u00e0 sinh s\u1ea3n c\u1ee7a c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3.<\/p>\n

D.<\/strong>qui \u0111\u1ecbnh chi\u1ec1u h\u01b0\u1edbng v\u00e0 nh\u1ecbp \u0111i\u1ec7u bi\u1ebfn \u0111\u1ed5i th\u00e0nh ph\u1ea7n ki\u1ec3u gen c\u1ee7a c\u00e1 th\u1ec3.<\/p>\n

C\u00e2u 34:<\/strong>(ID:91236)<\/strong>Ph\u00e1t bi\u1ec3u n\u00e0o d\u01b0\u1edbi \u0111\u1ea7y v\u1ec1 quy lu\u1eadt ho\u00e1n v\u1ecb gen l\u00e0 kh\u00f4ng \u0111\u00fang ?<\/p>\n

A. <\/strong>C\u01a1 s\u1edf t\u1ebf b\u00e0o h\u1ecdc c\u1ee7a quy lu\u1eadt ho\u00e1n v\u1ecb gen l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng trao \u0111\u1ed5i ch\u00e9o gi\u1eefa c\u00e1c cr\u00f4matit c\u1ee7a c\u1eb7p NST<\/p>\n

B.  <\/strong>Tr\u00ean c\u00f9ng m\u1ed9t NST c\u00e1c gen n\u1eb1m c\u00e0ng c\u00e1ch xa nhau th\u00ec \u0111\u1ed9t bi\u1ebfn gen c\u00e0ng b\u00e9 v\u00e0 ng\u01b0\u1ee3c l\u1ea1i<\/p>\n

C.<\/strong>Do xu h\u01b0\u1edbng ch\u1ee7 y\u1ebfu c\u1ee7a c\u00e1c gen tr\u00ean c\u00f9ng 1 NST l\u00e0 li\u00ean k\u1ebft n\u00ean trong gi\u1ea3m ph\u00e2n t\u1ea7n s\u1ed1 ho\u00e1n v\u1ecb gen kh\u00f4ng v\u01b0\u1ee3t qu\u1ea3 50%.<\/p>\n

D.<\/strong>Ho\u00e1n v\u1ecb gen l\u00e0m xu\u1ea5t hi\u1ec7n c\u00e1c t\u1ed5 h\u1ee3p gen m\u1edbi do s\u1ef1 \u0111\u1ed5i ch\u1ed7 c\u00e1c gen alen n\u1eb1m tr\u00ean c\u00e1c NST kh\u00e1c nhau c\u1ee7a c\u1eb7p t\u01b0\u01a1ng \u0111\u1ed3ng.<\/p>\n

C\u00e2u 35:<\/strong>(ID:91237)<\/strong>C\u00f3 bao nhi\u00eau c\u00e2u \u0111\u00fang trong c\u00e1c c\u00e2u sau \u0111\u00e2y khi n\u00f3i v\u00ea \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec3m?<\/p>\n

1. Trong s\u1ed1 c\u00e1c \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec3m th\u00ec ph\u1ea7n l\u1edbn \u0111\u1ed9t bi\u1ebfn thay th\u1ebf m\u1ed9t c\u1eb7p nucl\u00ea\u00f4tit l\u00e0 g\u00e2y h\u1ea1i \u00edt nh\u1ea5t cho c\u01a1 th\u1ec3 sinh v\u1eadt<\/p>\n

2. \u0110\u1ed9t bi\u1ebfn \u0111i\u1ec3m l\u00e0 nh\u1eefng bi\u1ebfn \u0111\u1ed5i \u0111\u1ed3ng th\u1eddi t\u1ea1i nhi\u1ec1u \u0111i\u1ec3m kh\u00e1c nhau trong gen c\u1ea5u tr\u00fac<\/p>\n

3. Trong b\u1ea5t c\u1ee9 tr\u01b0\u1eddng h\u1ee3p n\u00e0o, tuy\u1ec7t \u0111\u1ea1i \u0111a s\u1ed1 \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec3m l\u00e0 c\u00f3 h\u1ea1i.<\/p>\n

4. \u0110\u1ed9t bi\u1ebfn \u0111i\u1ec3m l\u00e0 nh\u1eefng bi\u1ebfn \u0111\u1ed5i nh\u1ecf n\u00ean \u00edt c\u00f3 vai tr\u00f2 trong qu\u00e1 tr\u00ecnh ti\u1ebfn h\u00f3a<\/p>\n

5. X\u00e9t \u1edf m\u1ee9c \u0111\u1ed9 ph\u00e2n t\u1eed, ph\u1ea7n nhi\u1ec1u \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec3m l\u00e0 trung t\u00ednh.<\/p>\n

6. M\u1ee9c \u0111\u1ed9 g\u00e2y h\u1ea1i c\u1ee7a alen \u0111\u1ed9t bi\u1ebfn ph\u1ee5 thu\u1ed9c v\u00e0o \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng v\u00e0 t\u1ed5 h\u1ee3p gen m\u00e0 n\u00f3 t\u1ed3n t\u1ea1i.<\/p>\n<\/div>\n

\n

A.<\/strong>5.    <\/p>\n

B.<\/strong>2.    <\/p>\n

C.<\/strong>4.    <\/p>\n

D.<\/strong>3<\/p>\n<\/div>\n

\n

C\u00e2u 36:<\/strong>(ID:91238)<\/strong>C\u1eb7p b\u1ed1 m\u1eb9 \u0111em lai c\u00f3 ki\u1ec3u gen Ab\/aB Dd  x Ab\/aB Dd  . Cho bi\u1ebft, m\u1ed7i gen quy \u0111\u1ecbnh m\u1ed9t t\u00ednh tr\u1ea1ng, t\u00ednh tr\u1ed9i l\u00e0 tr\u1ed9i ho\u00e0n to\u00e0n, m\u1ecdi di\u1ec5n bi\u1ebfn c\u1ee7a nhi\u1ec5m s\u1eafc th\u1ec3 trong qu\u00e1 tr\u00ecnh ph\u00e1t sinh giao t\u1eed \u0111\u1ef1c v\u00e0 giao t\u1eed c\u00e1i l\u00e0 ho\u00e0n to\u00e0n gi\u1ed1ng nhau. K\u1ebft qu\u1ea3 n\u00e0o d\u01b0\u1edbi \u0111\u00e2y ph\u00f9 h\u1ee3p v\u1edbi t\u1ec9 l\u1ec7 ki\u1ec3u h\u00ecnh l\u1eb7n 3 t\u00ednh tr\u1ea1ng \u1edf \u0111\u1eddi con?<\/p>\n<\/div>\n

\n

A.<\/strong>1.5625%.<\/p>\n

B.<\/strong>l,6525%                       <\/p>\n

C.<\/strong>1,125%.                       <\/p>\n

D.<\/strong>2,25%.<\/p>\n<\/div>\n

C\u00e2u 37:<\/strong>(ID:91239)<\/strong>M\u1ed9t c\u01a1 th\u1ec3 c\u00f3 ki\u1ec3u gen AaBb gi\u1ea3m ph\u00e2n ph\u00e1t sinh giao t\u1eed, \u1edf m\u1ed9t s\u1ed1 t\u1ebf b\u00e0o x\u1ea3y ra s\u1ef1 r\u1ed1i lo\u1ea1n ph\u00e2n ly trong gi\u1ea3m ph\u00e2n \u1edf c\u1eb7p nhi\u1ec5m s\u1eafc th\u1ec3 ch\u1ee9a c\u1eb7p gen Aa.<\/strong>C\u01a1 th\u1ec3 \u0111\u00f3 c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ed1 lo\u1ea1i giao t\u1eed t\u1ed1i \u0111a l\u00e0<\/p>\n

A.<\/strong>6.        B.<\/strong>4.            C.<\/strong>8.        D.<\/strong>12.<\/p>\n

C\u00e2u 38:<\/strong>(ID:91240)<\/strong>Lo\u1ea1i \u0111\u1ed9t bi\u1ebfn l\u00e0m t\u0103ng s\u1ed1 lo\u1ea1i alen trong c\u01a1 th\u1ec3 l\u00e0<\/p>\n

A.<\/strong>\u0111\u1ed9t bi\u1ebfn l\u1ec7ch b\u1ed9i.                 B.<\/strong>\u0111\u1ed9t bi\u1ebfn gen.<\/p>\n

C.<\/strong>\u0111\u1ed9t bi\u1ebfn l\u1eb7p \u0111o\u1ea1n nhi\u1ec5m s\u1eafc th\u1ec3 .          D.<\/strong>\u0111\u1ed9t bi\u1ebfn \u0111a b\u1ed9i.<\/p>\n

C\u00e2u 39:<\/strong>(ID:91241)<\/strong>N\u1ebfu s\u1ed1 l\u01b0\u1ee3ng nhi\u1ec5m s\u1eafc th\u1ec3 trong m\u1ed9t t\u1ebf b\u00e0o l\u01b0\u1ee1ng b\u1ed9i \u1edf pha G<\/p>\n

1<\/dd>\n

c\u1ee7a chu k\u00ec t\u1ebf b\u00e0o l\u00e0 24, th\u00ec s\u1ed1 ph\u00e2n t\u1eed ADN c\u1ee7a m\u1ed9t t\u1ebf b\u00e0o \u1edf k\u00ec cu\u1ed1i c\u1ee7a gi\u1ea3m ph\u00e2n I s\u1ebd l\u00e0<\/p>\n

A.<\/strong>12.            B.<\/strong>48.          C.<\/strong>24.           D.<\/strong>96.<\/p>\n

C\u00e2u 40:<\/strong>(ID:91242)<\/strong>B\u1eb1ng ch\u1ee9ng tr\u1ef1c ti\u1ebfp ch\u1ee9ng minh m\u1ed1i quan h\u1ec7 ti\u1ebfn ho\u00e1 gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt l\u00e0<\/p>\n

A.<\/strong>b\u1eb1ng ch\u1ee9ng gi\u1ea3i ph\u1eabu so s\u00e1nh.          B.<\/strong>B\u1eb1ng ch\u1ee9ng ho\u00e1 th\u1ea1ch,<\/p>\n

C.<\/strong>b\u1eb1ng ch\u1ee9ng sinh h\u1ecdc t\u1ebf b\u00e0o.            D.<\/strong>b\u1eb1ng ch\u1ee9ng sinh h\u1ecdc ph\u00e2n t\u1eed.<\/p>\n

C\u00e2u 41:<\/strong>(ID:91454)<\/strong>\u1ede m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt, b\u1ed9 nhi\u1ec5m s\u1eafc th\u1ec3 l\u01b0\u1ee1ng b\u1ed9i l\u00e0 2n = 20. Qu\u00e1 tr\u00ecnh nguy\u00ean ph\u00e2n li\u00ean ti\u1ebfp 4 l\u1ea7n t\u1eeb t\u1ebf b\u00e0o sinh d\u1ee5c s\u01a1 khai \u0111\u00e3 c\u1ea7n m\u00f4i tr\u01b0\u1eddng cung c\u1ea5p nguy\u00ean li\u1ec7u t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 285 nhi\u1ec5m s\u1eafc th\u1ec3. T\u1ebf b\u00e0o sinh d\u1ee5c s\u01a1 khai c\u00f3 b\u1ed9 nhi\u1ec5m s\u1eafc th\u1ec3  nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n

A.<\/strong>T\u1ebf b\u00e0o c\u00f3 b\u1ed9 NST l\u00e0 2n +1.            B.<\/strong>T\u1ebf b\u00e0o c\u00f3 b\u1ed9 NST l\u00e0 2n + 2.<\/p>\n

C.<\/strong>T\u1ebf b\u00e0o c\u00f3 b\u1ed9 NST l\u00e0 2n.              D.<\/strong>T\u1ebf b\u00e0o c\u00f3 b\u1ed9 NST l\u00e0 2n -1.<\/p>\n

C\u00e2u 42:<\/strong>(ID:91455)<\/strong>Qui tr\u00ecnh t\u1ea1o ra nh\u1eefng t\u1ebf b\u00e0o ho\u1eb7c nh\u1eefng c\u01a1 th\u1ec3 sinh v\u1eadt c\u00f3 h\u1ec7 gen b\u1ecb bi\u1ebfn \u0111\u1ed5i hay c\u00f3 th\u00eam gen m\u1edbi g\u1ecdi l\u00e0<\/p>\n

A.<\/strong>k\u0129 thu\u1eadt chuy\u1ec3n gen.                B.<\/strong>k\u0129 thu\u1eadt t\u1ea1o ADN t\u00e1i t\u1ed5 h\u1ee3p<\/p>\n

C.<\/strong>li\u1ec7u ph\u00e1p gen.                    D.<\/strong>c\u00f4ng ngh\u1ec7 gen.<\/p>\n

C\u00e2u 43:<\/strong>(ID:91456)<\/strong>M\u1ed9t \u0111\u1ea7m n\u01b0\u1edbc n\u00f4ng nu\u00f4i c\u00e1 c\u00f3 ba b\u1eadc dinh d\u01b0\u1ee1ng: vi khu\u1ea9n lam v\u00e0 t\u1ea3o (b\u1eadc 1); \u0111\u1ed9ng v\u1eadt ph\u00f9 du (b\u1eadc 2); t\u00f4m, c\u00e1 nh\u1ecf (b\u1eadc 3). Do ngu\u1ed3n ch\u1ea5t kho\u00e1ng t\u00edch t\u1ee5 nhi\u1ec1u n\u0103m t\u1eeb c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m \u1edf \u0111\u00e1y \u0111\u1ea7m t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho vi khu\u1ea9n lam v\u00e0 t\u1ea3o b\u00f9ng ph\u00e1t. \u0110\u1ec3 tr\u00e1nh h\u1ec7 sinh th\u00e1i \u0111\u1ea7m b\u1ecb \u00f4 nhi\u1ec5m n\u1eb7ng h\u01a1n do hi\u1ec7n t\u01b0\u1ee3ng ph\u00ec d\u01b0\u1ee1ng, c\u00e1ch n\u00e0o d\u01b0\u1edbi \u0111\u00e2y kh\u00f4ng n\u00ean th\u1ef1c hi\u1ec7n ?<\/p>\n

A.<\/strong>Th\u1ea3 th\u00eam v\u00e0o \u0111\u1ea7m m\u1ed9t s\u1ed1 t\u00f4m v\u00e0 c\u00e1 nh\u1ecf.<\/p>\n

B.<\/strong>\u0110\u00e1nh b\u1eaft b\u1edbt t\u00f4m v\u00e0 c\u00e1 nh\u1ecf .<\/p>\n

C.<\/strong>Ng\u0103n ch\u1eb7n ngu\u1ed3n dinh d\u01b0\u1ee1ng c\u1ee7a sinh v\u1eadt b\u1eadc 1.<\/p>\n

D.<\/strong>Th\u1ea3 th\u00eam v\u00e0o \u0111\u1ea7m m\u1ed9t s\u1ed1 c\u00e1 d\u1eef (b\u1eadc 4) \u0111\u1ec3 \u0103n t\u00f4m v\u00e0 c\u00e1 nh\u1ecf.<\/p>\n

C\u00e2u 44:<\/strong>(ID:91457)<\/strong>Trong ph\u00e9p lai ph\u00e2n t\u00edch ru\u1ed3i gi\u1ea5m c\u00e1i F1 d\u1ecb h\u1ee3p 2 c\u1eb7p gen c\u00f3 ki\u1ec3u h\u00ecnh th\u00e2n x\u00e1m, c\u00e1nh d\u00e0i, Moocgan thu \u0111\u01b0\u1ee3c t\u1ec9 l\u1ec7 ki\u1ec3u h\u00ecnh \u1edf con lai l\u00e0<\/p>\n

A.<\/strong>50% : 50%.                    B.<\/strong>41,5% : 41,5% : 8,5% : 8,5%.<\/p>\n

C.<\/strong>75% : 25%                     D.<\/strong>37,5% : 37,5% : 12,5% : 12,5%.<\/p>\n

C\u00e2u 45:<\/strong>(ID:91458)<\/strong>Nh\u00f3m sinh v\u1eadt nh\u00e2n s\u01a1 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c ti\u1ebfn ho\u00e1 theo chi\u1ec1u h\u01b0\u1edbng<\/p>\n

A. gi\u1eef nguy\u00ean t\u1ed5 ch\u1ee9c c\u01a1 th\u1ec3, \u0111a d\u1ea1ng ho\u00e1 c\u00e1c h\u00ecnh th\u1ee9c chuy\u1ec3n ho\u00e1 v\u1eadt ch\u1ea5t<\/p>\n

B. \u0111\u01a1n gi\u1ea3n ho\u00e1 t\u1ed5 ch\u1ee9c c\u01a1 th\u1ec3 th\u00edch nghi v\u1edbi \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng.<\/p>\n

C. n\u00e2ng cao d\u1ea7n t\u1ed5 ch\u1ee9c c\u01a1 th\u1ec3 t\u1eeb \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn ph\u1ee9c t\u1ea1p.<\/p>\n

D. ng\u00e0y c\u00e0ng \u0111a d\u1ea1ng v\u00e0 phong  ph\u00fa, t\u1ed5 ch\u1ee9c ng\u00e0y c\u00e0ng cao.<\/p>\n

C\u00e2u 46:<\/strong>(ID:91459)<\/strong>C\u00e1c d\u1eabn li\u1ec7u sau \u0111\u00e2y bi\u1ec3u th\u1ecb d\u00f2ng n\u0103ng l\u01b0\u1ee3ng \u0111i qua m\u1ed9t chu\u1ed7i th\u1ee9c \u0103n trong h\u1ec7 sinh th\u00e1i g\u1ed3m c\u00e1c lo\u00e0i ng\u00f4, ch\u00e2u ch\u1ea5u v\u00e0 g\u00e0. C\u00e1c th\u00f4ng s\u1ed1 li\u00ean quan \u0111\u1ebfn d\u00f2ng n\u0103ng l\u01b0\u1ee3ng (bi\u1ec3u th\u1ecb qua t\u1ec9 l\u1ec7 %) g\u1ed3m: I l\u00e0 n\u0103ng l\u01b0\u1ee3ng ti\u00eau th\u1ee5, A l\u00e0 n\u0103ng l\u01b0\u1ee3ng h\u1ea5p th\u1ee5, F l\u00e0 n\u0103ng  l\u01b0\u1ee3ng th\u1ea3i b\u1ecf (ph\u00e2n, n\u01b0\u1edbc ti\u1ec3u, v\u1ecf c\u00e2y..), R l\u00e0 n\u0103ng l\u01b0\u1ee3ng m\u1ea5t \u0111i do h\u00f4 h\u1ea5p v\u00e0 p l\u00e0 n\u0103ng l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t \u0111\u01b0\u1ee3c.<\/strong><\/p>\n\n\n\n\n\n\n

\n C\u00e1c lo\u00e0i<\/p>\n<\/td>\n	\n I<\/p>\n<\/td>\n	\n A<\/p>\n<\/td>\n	\n F<\/p>\n<\/td>\n	\n R<\/p>\n<\/td>\n	\n p<\/p>\n<\/td>\n<\/tr>\n
\n Ng\u00f4<\/p>\n<\/td>\n	\n 100<\/p>\n<\/td>\n	\n 40<\/p>\n<\/td>\n	\n 60<\/p>\n<\/td>\n	\n 35<\/p>\n<\/td>\n	\n 5<\/p>\n<\/td>\n<\/tr>\n
\n Ch\u00e2u ch\u1ea5u<\/p>\n<\/td>\n	\n 100<\/p>\n<\/td>\n	\n 34<\/p>\n<\/td>\n	\n 60<\/p>\n<\/td>\n	\n 24<\/p>\n<\/td>\n	\n 10<\/p>\n<\/td>\n<\/tr>\n
\n G\u00e0<\/p>\n<\/td>\n	\n 100<\/p>\n<\/td>\n	\n 90<\/p>\n<\/td>\n	\n 10<\/p>\n<\/td>\n	\n 88<\/p>\n<\/td>\n	\n 2<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n  Hi\u1ec7u su\u1ea5t sinh th\u00e1i v\u1ec1 n\u0103ng l\u01b0\u1ee3ng c\u1ee7a chu\u1ed7i th\u1ee9c \u0103n trong h\u1ec7 sinh th\u1ea3i n\u00f3i tr\u00ean l\u00e0<\/p>\n A. 0,02%          B.<\/strong>0,01%.         C.<\/strong>10%.          D.<\/strong>5%.<\/p>\n C\u00e2u 47:<\/strong>(ID:91460)<\/strong>\u1ede ng\u00f4, t\u00ednh tr\u1ea1ng chi\u1ec1u cao do 3 c\u1eb7p gen kh\u00f4ng alen t\u00e1c \u0111\u1ed9ng theo ki\u1ec3u c\u1ed9ng g\u1ed9p (A<\/p>\n l<\/dd>\n ,a<\/p>\n l<\/dd>\n , A<\/p>\n 2<\/dd>\n .a<\/p>\n 2<\/dd>\n ,A<\/p>\n 3<\/dd>\n ,a<\/p>\n 3<\/dd>\n ), ch\u00fang ph\u00e2n ly \u0111\u1ed9c l\u1eadp v\u00e0 c\u1ee9 m\u1ed7i gen tr\u1ed9i khi c\u00f3 m\u1eb7t trong ki\u1ec3u gen s\u1ebd l\u00e0m cho c\u00e2y th\u1ea5p \u0111i 20 cm, c\u00e2y cao nh\u1ea5t c\u00f3 chi\u1ec1u cao 210cm. \u1ede khi cho c\u00e1c c\u00e2y \u1edf th\u1ebf h\u1ec7 lai (gi\u1eefa c\u00e2y cao nh\u1ea5t v\u00e0 c\u00e2y th\u1ea5p nh\u1ea5t) giao ph\u1ea5n v\u1edbi nhau th\u00ec t\u1ef7 l\u1ec7 s\u1ed1 c\u00e2y c\u00f3 chi\u1ec1u cao 170 cm l\u00e0 bao nhi\u00eau?<\/p>\n   A.<\/strong>15\/64          B.<\/strong>3\/8         C.<\/strong>3\/32          D.<\/strong>9\/64<\/p>\n C\u00e2u 48:<\/strong>(ID:91461)<\/strong>B\u1ec7nh m\u00f9 m\u00e0u \u0111\u1ecf – l\u1ee5c v\u00e0 b\u1ec7nh m\u00e1u kh\u00f3 \u0111\u00f4ng do hai gen l\u1eb7n n\u1eb3m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 X quy \u0111\u1ecbnh, c\u00e1ch nhau 12cM. Cho s\u01a1 \u0111\u1ed3 ph\u1ea3 h\u1ec7 sau:<\/p>\n <\/p>\n Hi\u1ec7n nay, ng\u01b0\u1eddi ph\u1ee5 n\u1eef \u1edf th\u1ebf h\u1ec7 th\u1ee9 2  \u0111ang mang thai, x\u00e1c su\u1ea5t ng\u01b0\u1eddi ph\u1ee5 n\u1eef n\u00e0y sinh m\u1ed9t b\u00e9 trai b\u00ecnh th\u01b0\u1eddng (kh\u00f4ng m\u1eafc c\u1ea3 hai b\u1ec7nh di truy\u1ec1n tr\u00ean) l\u00e0 bao nhi\u00eau?<\/p>\n A.<\/strong>3%.         B.<\/strong>75%.             C.<\/strong>22%.         D.<\/strong>25%.<\/p>\n C\u00e2u 49.<\/strong>(ID:91462<\/strong>)Tr\u00ean c\u00e1c c\u00e1nh \u0111\u1ed3ng l\u00faa \u1edf mi\u1ec1n B\u1eafc, nhi\u1ec1u n\u01a1i l\u00faa b\u1ecb chu\u1ed9t ph\u00e1 ho\u1ea1i r\u1ea5t m\u1ea1nh. D\u1ef1a v\u00e0o \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc c\u1ee7a chu\u1ed9t v\u00e0 xem x\u00e9t \u1edf g\u00f3c \u0111\u1ed9 sinh th\u00e1i h\u1ecdc, bi\u1ec7n ph\u00e1p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y c\u00f3 hi\u1ec7u qu\u1ea3 nh\u1ea5t trong vi\u1ec7c l\u00e0m gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng qu\u1ea7n th\u1ec3 chu\u1ed9t m\u1ed9t c\u00e1ch b\u1ec1n v\u1eefng?<\/p>\n C.<\/strong>D\u00f9ng ni l\u00f4ng bao quanh b\u1edd ru\u1ed9ng \u0111\u1ec3 ng\u0103n chu\u1ed9t \u0103n l\u00faa.<\/strong><\/p>\n D.<\/strong>D\u00f9ng b\u1ea3 \u0111\u1ec3 ti\u00eau di\u1ec7t chu\u1ed9t.<\/p>\n C\u00e2u 50:<\/strong>(ID:91463)<\/strong>S\u1ef1 ki\u1ec7n n\u00e0o sau \u0111\u00e2y sau \u0111\u00e2y c\u00f3 n\u1ed9i dung kh\u00f4ng \u0111\u00fang v\u1edbi qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i ADN \u1edf t\u1ebf b\u00e0o nh\u00e2n th\u1ef1c?<\/p>\n A.<\/strong>Nh\u1edd c\u00e1c enzim th\u00e1o xo\u1eafn, hai m\u1ea1ch \u0111\u01a1n c\u1ee7a ph\u00e2n t\u1eed ADN t\u00e1ch d\u1ea7n t\u1ea1o n\u00ean ch\u1ea1c 3 t\u00e1i b\u1ea3n v\u00e0 \u0111\u1ec3 l\u1ed9 ra hai m\u1ea1ch khu\u00f4n.<\/p>\n B.<\/strong>Enzim ADN – polimeraza s\u1eed d\u1ee5ng m\u1ed9t m\u1ea1ch l\u00e0m khu\u00f4n t\u1ed5ng h\u1ee3p n\u00ean m\u1ea1ch m\u1edbi theo nguy\u00ean t\u1eafc b\u1ed5 sung, trong \u0111\u00f3 A li\u00ean k\u1ebft v\u1edbi T v\u00e0 ng\u01b0\u1ee3c l\u1ea1i; G lu\u00f4n li\u00ean k\u1ebft v\u1edbi X v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n C.<\/strong>V\u00ec enzim ADN – polimeraza ch\u1ec9 t\u1ed5ng h\u1ee3p m\u1ea1ch m\u1edbi theo chi\u1ec1u 5\u2019 – 3\u2019, n\u00ean tr\u00ean m\u1ea1ch khu\u00f4n 5\u2019 – 3\u2019 m\u1ea1ch m\u1edbi \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p li\u00ean t\u1ee5c, c\u00f2n tr\u00ean m\u1ea1ch khu\u00f4n 3\u2019 – 5\u2019 m\u1ea1ch m\u1edbi \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p ng\u1eaft qu\u00e3ng t\u1ea1o n\u00ean c\u00e1c \u0111o\u1ea1n ng\u1eafn r\u1ed3i \u0111\u01b0\u1ee3c n\u1ed1i l\u1ea1i nh\u1edd enzim n\u1ed1i.<\/p>\n D.<\/strong>Trong m\u1ed7i ph\u00e2n t\u1eed ADN \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh th\u00ec m\u1ed9t m\u1ea1ch l\u00e0 m\u1edbi \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p, c\u00f2n m\u1ea1ch kia l\u00e0 c\u1ee7a ADN ban \u0111\u1ea7u (nguy\u00ean t\u1eafc b\u00e1n b\u1ea3o t\u1ed3n).<\/p>\n \u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh – \u0110\u1ec1 s\u1ed1 2 n\u0103m 2016<\/strong><\/p>\n <\/strong><\/p>\n<\/p>\n T\u1ea5t c\u1ea3 n\u1ed9i dung b\u00e0i vi\u1ebft. C\u00e1c em h\u00e3y xem th\u00eam v\u00e0 t\u1ea3i file chi ti\u1ebft t\u1ea1i \u0111\u00e2y:<\/strong>Download<\/p>\n","protected":false},"excerpt":{"rendered":" \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh, thu th\u1eed l\u1ea7n 2 n\u0103m 2016. Theo \u0111\u00f3, \u0111\u1ec1 thi c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i chi ti\u1ebft, c\u00e1c em tham kh\u1ea3o ph\u00eda d\u01b0\u1edbi. Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh C\u00e2u 1:(ID:91203) M\u1ed9t gia \u0111\u00ecnh: ch\u1ed3ng c\u00f3 m\u1ed9t t\u00fam l\u00f4ng \u1edf tai, v\u1ee3 b\u00ecnh […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[129],"tags":[],"yoast_head":"\n