\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh n\u0103m 2016 t\u1ed5 ch\u1ee9c thi l\u1ea7n th\u1ee9 6 bao g\u1ed3m 50 c\u00e2u h\u1ecfi v\u00e0 c\u00f3 \u0111\u00e1p \u00e1n h\u01b0\u1edbng d\u1eabn tr\u1ea3 l\u1eddi b\u00ean 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: (ID:94173)<\/strong>\u1ede vi khu\u1ea9n, m\u1ed9t gen b\u00ecnh th\u01b0\u1eddng \u0111i\u1ec1u khi\u1ec3n t\u1ed5ng h\u1ee3p 1 ph\u00e2n t\u1eed protein ho\u00e0n ch\u1ec9nh c\u00f3 298 axit amin. \u0110\u1ed9t bi\u1ebfn \u0111i\u1ec3m x\u1ea3y ra d\u1eabn \u0111\u1ebfn gen sau \u0111\u1ed9t bi\u1ebfn c\u00f3 ch\u1ee9a 3594 li\u00ean k\u1ebft photphoeste. D\u1ea1ng \u0111\u1ed9t bi\u1ebfn x\u1ea3y ra l\u00e0<\/p>\n

A. <\/strong>Thay th\u1ebf m\u1ed9t c\u1eb7p A-T b\u1eb1ng 1 c\u1eb7p G-X<\/span><\/p>\n

B. <\/strong>Thay th\u1ebf m\u1ed9t c\u1eb7p nucleotit b\u1eb1ng m\u1ed9t c\u1eb7p nucleotit kh\u00e1c<\/span><\/p>\n

C. <\/strong>Th\u00eam m\u1ed9t c\u1eb7p nucleotit<\/span><\/p>\n

D. <\/strong>M\u1ea5t m\u1ed9t c\u1eb7p nucleotit<\/span><\/p>\n

C\u00e2u 2:<\/strong>(ID:94174)<\/strong>Quy lu\u1eadt ph\u00e2n li \u0111\u1ed9c l\u1eadp th\u1ef1c ch\u1ea5t n\u00f3i v\u1ec1<\/p>\n

A. <\/strong>S\u1ef1 ph\u00e2n li \u0111\u1ed9c l\u1eadp c\u1ee7a c\u00e1c t\u00ednh tr\u1ea1ng<\/span><\/p>\n

B. <\/strong>S\u1ef1 t\u1ed5 h\u1ee3p c\u1ee7a c\u00e1c alen trong qu\u00e1 tr\u00ecnh th\u1ee5 tinh<\/span><\/p>\n

C. <\/strong>S\u1ef1 ph\u00e2n li ki\u1ec3u h\u00ecnh theo t\u1ec9 l\u1ec7 9:3:3:1<\/span><\/p>\n

D. <\/strong>S\u1ef1 ph\u00e2n li \u0111\u1ed9c l\u1eadp c\u1ee7a c\u00e1c alen trong qu\u00e1 tr\u00ecnh gi\u1ea3m ph\u00e2n<\/span><\/p>\n

C\u00e2u 3:<\/strong>(ID:94175)<\/strong>Khi n\u00f3i v\u1ec1 c\u00e1c y\u1ebfu t\u1ed1 ng\u1eabu nhi\u00ean, x\u00e9t c\u00e1c ph\u00e1t bi\u1ec3u sau \u0111\u00e2y:<\/p>\n

(1) S\u1ef1 thay \u0111\u1ed5i th\u00e0nh ph\u1ea7n ki\u1ec3u gen v\u00e0 t\u1ea7n s\u1ed1 alen c\u1ee7a qu\u1ea7n th\u1ec3 do c\u00e1c y\u1ebfu t\u1ed1 ng\u1eabu nhi\u00ean lu\u00f4n theo m\u1ed9t \u0111\u01b0\u1eddng x\u00e1c \u0111\u1ecbnh<\/p>\n

(2) C\u00e1c y\u1ebfu t\u1ed1 ng\u1eabu nhi\u00ean c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n m\u1ed9t alen n\u00e0o \u0111\u00f3 ra kh\u1ecfi qu\u1ea7n th\u1ec3<\/p>\n

(3) Qu\u1ea7n th\u1ec3 c\u00f3 k\u00edch th\u01b0\u1edbc c\u00e0ng nh\u1ecf th\u00ec c\u00e1c y\u1ebfu t\u1ed1 ng\u1eabu nhi\u00ean c\u00e0ng d\u1ec5 l\u00e0m thay \u0111\u1ed5i t\u1ea7n s\u1ed1 alen v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n ki\u1ec3u gen<\/p>\n

(4) S\u1ef1 t\u0103ng hay gi\u1ea3m t\u1ea7n s\u1ed1 alen do c\u00e1c y\u1ebfu t\u1ed1 ng\u1eabu nhi\u00ean g\u00e2y ra kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1ea1ng th\u00e1i tr\u1ed9i hay l\u1eb7n c\u1ee7a alen \u0111\u00f3.<\/p>\n

C\u00f3 bao nhi\u00eau k\u1ebft lu\u1eadn \u0111\u00fang?<\/p>\n

A. <\/strong>3<\/span><\/p>\n

B. <\/strong>1<\/span><\/p>\n

C. <\/strong>2<\/span><\/p>\n

D. <\/strong>4<\/span><\/p>\n<\/div>\n

C\u00e2u 4:<\/strong>(ID:94176)<\/strong>\u1ede ng\u01b0\u1eddi, gen B quy \u0111\u1ecbnh h\u00f3i \u0111\u1ea7u, gen b quy \u0111\u1ecbnh b\u00ecnh th\u01b0\u1eddng; ki\u1ec3u gen Bb quy \u0111\u1ecbnh h\u00f3i \u0111\u1ea7u \u1edf nam v\u00e0 b\u00ecnh th\u01b0\u1eddng \u1edf n\u1eef. M\u1ed9t ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng c\u00f3 ki\u1ec3u gen d\u1ecb h\u1ee3p, l\u1ea5y m\u1ed9t ch\u1ed3ng kh\u00f4ng h\u00f3i, h\u1ecd sinh \u0111\u01b0\u1ee3c hai ng\u01b0\u1eddi con, x\u00e1c su\u1ea5t \u0111\u1ec3 hai \u0111\u1ee9a con c\u1ee7a h\u1ecd l\u1edbn l\u00ean kh\u00f4ng b\u1ecb h\u00f3i l\u00e0<\/span><\/p>\n

A. <\/strong>9\/16<\/span><\/p>\n

B. <\/strong>1\/16<\/span><\/p>\n

C. <\/strong>1\/4<\/span><\/p>\n

D. <\/strong>1\/8<\/span><\/p>\n

C\u00e2u 5:<\/strong>(ID:94177)<\/strong>Li\u1ec7u ph\u00e1p gen l\u00e0<\/span><\/p>\n

A. <\/strong>Nghi\u00ean c\u1ee9u c\u00e1c gi\u1ea3i ph\u00e1p \u0111\u1ec3 s\u1eeda ch\u1eefa ho\u1eb7c c\u1eaft b\u1ecf c\u00e1c gen g\u00e2y b\u1ec7nh \u1edf ng\u01b0\u1eddi<\/span><\/p>\n

B. <\/strong>Ph\u1ee5c h\u1ed3i ch\u1ee9c n\u0103ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a t\u1ebf b\u00e0o hay m\u00f4, ph\u1ee5c h\u1ed3i sai h\u1ecfng di truy\u1ec1n<\/span><\/p>\n

C. <\/strong>Chuy\u1ec3n gen mong mu\u1ed1n t\u1eeb lo\u00e0i n\u00e0y sang lo\u00e0i kh\u00e1c \u0111\u1ec3 t\u1ea1o gi\u1ed1ng m\u1edbi<\/span><\/p>\n

D. <\/strong>Ch\u1eefa tr\u1ecb c\u00e1c b\u1ec7nh di truy\u1ec1n b\u1eb1ng c\u00e1ch ph\u1ee5c h\u1ed3i ch\u1ee9c n\u0103ng c\u1ee7a c\u00e1c gen b\u1ecb \u0111\u1ed9t bi\u1ebfn<\/span><\/p>\n

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C\u00e2u 6:<\/strong>(ID:94178)<\/strong>\u1ede m\u1ed9t lo\u00e0i \u0111\u1ed9ng v\u1eadt kh\u1ed1i l\u01b0\u1ee3ng c\u01a1 th\u1ec3  do 4 c\u1eb7p gen ph\u00e2n li \u0111\u1ed9c l\u1eadp theo ki\u1ec3u t\u01b0\u01a1ng t\u00e1c c\u1ed9ng g\u1ed9p quy \u0111\u1ecbnh ( m\u1ed7i c\u1eb7p gen g\u1ed3m 2 alen tr\u1ed9i l\u1eb7n ). Khi lai 2 c\u01a1 th\u1ec3 \u0111\u1ed3ng h\u1ee3p tr\u1ed9i v\u00e0 \u0111\u1ed3ng h\u1ee3p l\u1eb7n thu \u0111\u01b0\u1ee3c F<\/p>\n

1<\/dd>\n

, cho F<\/p>\n

1<\/dd>\n

giao ph\u1ed1i thu \u0111\u01b0\u1ee3c F<\/p>\n

2<\/dd>\n

. T\u1ec9 l\u1ec7 s\u1ed1 c\u00e1 th\u1ec3 F<\/p>\n

2<\/dd>\n

c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng trung b\u00ecnh l\u00e0 (b\u1ecf qua t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng)<\/p>\n

A. <\/strong>35\/128<\/span><\/p>\n

B. <\/strong>1\/256<\/span><\/p>\n

C.<\/strong>1\/2<\/span><\/p>\n

D. <\/strong>1\/16<\/span><\/p>\n<\/div>\n

C\u00e2u 7:<\/strong>(ID:94179)<\/strong>V\u1eadt ch\u1ea5t di truy\u1ec1n c\u1ee7a m\u1ed9t ch\u1ee9ng g\u00e2y b\u1ec7nh \u1edf ng\u01b0\u1eddi l\u00e0 m\u1ed9t ph\u00e2n t\u1eed axit nucleic c\u00f3 t\u1ec9 l\u1ec7 c\u00e1c lo\u1ea1i nucleotit g\u1ed3m 22%A, 22%T, 27%G, 29%X. V\u1eadt ch\u1ea5t di truy\u1ec1n c\u1ee7a ch\u1ee7ng virut n\u00e0y l\u00e0<\/span><\/p>\n

A. <\/strong>ARN m\u1ea1ch k\u00e9p<\/span><\/p>\n

B. <\/strong>ADN m\u1ea1ch k\u00e9p<\/span><\/p>\n

C. <\/strong>ARN m\u1ea1ch \u0111\u01a1n<\/span><\/p>\n

D. <\/strong>ADN m\u1ea1ch \u0111\u01a1n<\/span><\/p>\n

C\u00e2u 8:<\/strong>(ID:94180)<\/strong>\u1ede c\u00e0 chua, t\u00ednh tr\u1ea1ng m\u00e0u s\u1eafc do m\u1ed9t gen g\u1ed3m 2 alen quy \u0111\u1ecbnh, qu\u1ea3 \u0111\u1ecf tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi qu\u1ea3 v\u00e0ng. Cho c\u00e1c c\u00e2y qu\u1ea3 \u0111\u1ecf giao ph\u1ea5n v\u1edbi nhau \u0111\u01b0\u1ee3c F<\/span><\/p>\n

1<\/dd>\n

c\u00f3 t\u1ec9 l\u1ec7 ki\u1ec3u h\u00ecnh 84% \u0111\u1ecf: 16% v\u00e0ng. N\u1ebfu cho c\u00e1c c\u00e2y qu\u1ea3 \u0111\u1ecf \u1edf F<\/span><\/p>\n

1<\/dd>\n

t\u1ef1 th\u1ee5 ph\u1ea5n th\u00ec t\u1ec9 l\u1ec7 ki\u1ec3u h\u00ecnh \u1edf F<\/span><\/p>\n

2<\/dd>\n

l\u00e0:<\/span><\/p>\n

A. <\/strong>3 \u0111\u1ecf: 1 v\u00e0ng<\/span><\/p>\n

B. <\/strong>6 \u0111\u1ecf : 1 v\u00e0ng<\/span><\/p>\n

C. <\/strong>18 \u0111\u1ecf: 7 v\u00e0ng<\/span><\/p>\n

D. <\/strong>5 \u0111\u1ecf: 1 v\u00e0ng<\/span><\/p>\n

C\u00e2u 9:<\/strong>(ID:94181)<\/strong>Anh Nguy\u1ec5n V\u0103n P b\u1ecb nghi l\u00e0 con c\u1ee7a m\u1ed9t ng\u01b0\u1eddi b\u1ed1 l\u1ea1 m\u1eb7t (\u00f4ng Q). \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c quan h\u1ec7 huy\u1ebft th\u1ed1ng gi\u1eefa 2 ng\u01b0\u1eddi th\u00ec ph\u1ea3i s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p<\/span><\/p>\n

A. <\/strong>So s\u00e1nh ki\u1ec3u gen c\u1ee7a anh P v\u1edbi ki\u1ec3u gen c\u1ee7a \u00f4ng Q<\/span><\/p>\n

B. <\/strong>So s\u00e1nh d\u1ea5u v\u00e2n tay c\u1ee7a anh P v\u1edbi d\u1ea5u v\u00e2n tay c\u1ee7a \u00f4ng Q<\/span><\/p>\n

C. <\/strong>So s\u00e1nh c\u1ea5u tr\u00fac ADN c\u1ee7a anh P v\u1edbi c\u1ea5u tr\u00fac ADN c\u1ee7a \u00f4ng Q<\/span><\/p>\n

D. <\/strong>So s\u00e1nh ch\u1ec9 s\u1ed1 ADN c\u1ee7a anh P v\u1edbi ch\u1ec9 s\u1ed1 ADN c\u1ee7a \u00f4ng Q<\/span><\/p>\n

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C\u00e2u 10: (ID:94182)<\/strong>\u1ede m\u1ed9t lo\u00e0i \u0111\u1ed9ng v\u1eadt, cho con c\u00e1i (XX) ch\u00e2n cao thu\u1ea7n ch\u1ee7ng lai v\u1edbi con \u0111\u1ef1c (XY) ch\u00e2n th\u1ea5p \u0111\u01b0\u1ee3c F<\/p>\n

1<\/dd>\n

\u0111\u1ed3ng lo\u1ea1t ch\u00e2n cao. Cho con \u0111\u1ef1c F<\/p>\n

1<\/dd>\n

lai ph\u00e2n t\u00edch, \u0111\u1eddi F<\/p>\n

b<\/dd>\n

thu \u0111\u01b0\u1ee3c 50% con \u0111\u1ef1c ch\u00e2n th\u1ea5p, 25% con c\u00e1i ch\u00e2n cao, 25% con c\u00e1i ch\u00e2n th\u1ea5p. N\u1ebfu cho F<\/p>\n

1<\/dd>\n

giao ph\u1ed1i t\u1ef1 do \u0111\u01b0\u1ee3c F<\/p>\n

2<\/dd>\n

th\u00ec theo l\u00fd thuy\u1ebft, \u1edf F<\/p>\n

2<\/dd>\n

lo\u1ea1i c\u00e1 th\u1ec3 \u0111\u1ef1c ch\u00e2n cao chi\u1ebfm t\u1ec9 l\u1ec7<\/p>\n

A. <\/strong>6,25%<\/span><\/p>\n<\/div>\n

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B. <\/strong>18,75%<\/p>\n

C. <\/strong>37,5%<\/span><\/p>\n

D. <\/strong>25%<\/p>\n<\/div>\n

C\u00e2u 11:<\/strong>(ID:94183)<\/strong>C\u01a1 th\u1ec3 b\u00ecnh th\u01b0\u1eddng c\u00f3 gen ti\u1ec1n ung th\u01b0 nh\u01b0ng gen n\u00e0y kh\u00f4ng phi\u00ean m\u00e3 n\u00ean c\u01a1 th\u1ec3 kh\u00f4ng b\u1ecb ung th\u01b0. Khi gen ti\u1ec1n ung th\u01b0 b\u1ecb \u0111\u1ed9t bi\u1ebfn th\u00e0nh gen ung th\u01b0 th\u00ec c\u01a1 th\u1ec3 s\u1ebd b\u1ecb b\u1ec7nh. Gen ti\u1ec1n ung th\u01b0 b\u1ecb \u0111\u1ed9t bi\u1ebfn \u1edf v\u00f9ng n\u00e0o sau \u0111\u00e2y c\u1ee7a gen ?<\/span><\/p>\n

A. <\/strong>V\u00f9ng b\u1ea5t k\u00ec \u1edf tr\u00ean gen<\/span><\/p>\n

B. <\/strong>V\u00f9ng k\u1ebft th\u00fac<\/span><\/p>\n

C. <\/strong>V\u00f9ng \u0111i\u1ec1u h\u00f2a<\/span><\/p>\n

D. <\/strong>V\u00f9ng m\u00e3 h\u00f3a<\/span><\/p>\n

C\u00e2u 12:<\/strong>(ID:94184)<\/strong>Khi n\u00f3i v\u1ec1 ch\u1ecdn l\u1ecdc t\u1ef1 nhi\u00ean (CLTN ) x\u00e9t c\u00e1c k\u1ebft lu\u1eadn sau \u0111\u00e2y<\/span><\/p>\n

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(1) CLTN kh\u00f4ng t\u1ea1o ra ki\u1ec3u gen th\u00edch nghi n\u00f3 ch\u1ec9 \u0111\u00e0o th\u1ea3i c\u00e1c ki\u1ec3u gen quy \u0111\u1ecbnh ki\u1ec3u h\u00ecnh k\u00e9m th\u00edch nghi<\/p>\n

(2) CLTN t\u00e1c \u0111\u1ed9ng \u0111\u00e0o th\u1ea3i alen tr\u1ed9i s\u1ebd l\u00e0m thay \u0111\u1ed5i th\u00e0nh ph\u1ea7n ki\u1ec3u gen nhanh h\u01a1n so v\u1edbi \u0111\u00e0o th\u1ea3i alen l\u1eb7n<\/p>\n

(3) C\u00e1c c\u00e1 th\u1ec3 c\u00f9ng lo\u00e0i, s\u1ed1ng trong c\u00f9ng m\u1ed9t khu v\u1ef1c \u0111\u1ecba l\u00fd lu\u00f4n \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc t\u1ef1 nhi\u00ean t\u00edch l\u0169y bi\u1ebfn d\u1ecb theo m\u1ed9t h\u01b0\u1edbng<\/p>\n

(4) CLTN t\u00e1c \u0111\u1ed9ng l\u00ean qu\u1ea7n th\u1ec3 vi khu\u1ea9n l\u00e0m thay \u0111\u1ed5i t\u1ea7n s\u1ed1 alen nhanh h\u01a1n so v\u1edbi t\u00e1c \u0111\u1ed9ng l\u00ean qu\u1ea7n th\u1ec3 \u0111\u1ed9ng v\u1eadt b\u1eadc cao<\/p>\n

(5) CLTN t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp l\u00ean alen, n\u00f3 lo\u1ea1i b\u1ecf t\u1ea5t c\u1ea3 c\u00e1c alen c\u00f3 h\u1ea1i ra kh\u1ecfi qu\u1ea7n th\u1ec3.<\/p>\n

C\u00f3 bao nhi\u00eau k\u1ebft lu\u1eadn \u0111\u00fang?<\/p>\n

A. <\/strong>4<\/span><\/p>\n

B. <\/strong>3<\/span><\/p>\n

C. <\/strong>5<\/span><\/p>\n

D. <\/strong>2<\/span><\/p>\n<\/div>\n

C\u00e2u 13:<\/strong>(ID:94185)<\/strong>T\u1ea1i sao \u0111\u1ed9t bi\u1ebfn gen th\u01b0\u1eddng c\u00f3 h\u1ea1i cho c\u01a1 th\u1ec3 sinh v\u1eadt nh\u01b0ng v\u1eabn c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh ti\u1ebfn h\u00f3a?<\/span><\/p>\n

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III. Gen \u0111\u1ed9t bi\u1ebfn c\u00f3 th\u1ec3 c\u00f3 h\u1ea1i trong t\u1ed5 h\u1ee3p gen n\u00e0y nh\u01b0ng l\u1ea1i c\u00f3 th\u1ec3 tr\u1edf n\u00ean v\u00f4 h\u1ea1i ho\u1eb7c c\u00f3 l\u1ee3i trong t\u1ed5 h\u1ee3p gen kh\u00e1c<\/p>\n

C\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang nh\u1ea5t l\u00e0<\/p>\n

A. <\/strong>I v\u00e0 II<\/span><\/p>\n

B. <\/strong>III v\u00e0 IV<\/span><\/p>\n

C. <\/strong>II v\u00e0 III<\/span><\/p>\n

D. <\/strong>I v\u00e0 III<\/span>.<\/em><\/p>\n<\/div>\n

C\u00e2u 14:<\/strong>(ID:94186)<\/strong>Cho c\u00e1c bi\u1ec7n ph\u00e1p:<\/span><\/p>\n

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1-   Dung h\u1ee3p t\u1ebf b\u00e0o tr\u1ea7n<\/p>\n

2-   C\u1ea5y truy\u1ec1n ph\u00f4i<\/p>\n

3-   Nh\u00e2n b\u1ea3n v\u00f4 t\u00ednh<\/p>\n

4-   Nu\u00f4i c\u1ea5y h\u1ea1t ph\u1ea5n sau \u0111\u00f3 l\u01b0\u1ee1ng b\u1ed9i h\u00f3a<\/p>\n

5-   T\u1ef1 th\u1ee5 ph\u1ea5n li\u00ean t\u1ee5c t\u1eeb 5 \u0111\u1ebfn 7 \u0111\u1eddi k\u1ebft h\u1ee3p v\u1edbi ch\u1ecdn l\u1ecdc<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra d\u00f2ng thu\u1ea7n ch\u1ee7ng l\u00e0<\/p>\n

A. <\/strong>4,5<\/span><\/p>\n

B. <\/strong>1,2,3,4,5<\/span><\/p>\n

C. <\/strong>2,3,4<\/span><\/p>\n

D. <\/strong>3,4,5<\/span><\/p>\n<\/div>\n

C\u00e2u 15: (ID:94187)<\/strong>\u1ede m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt, alen A qui \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 alen b quy \u0111\u1ecbnh th\u00e2n th\u1ea5p, c\u00e1c gen ph\u00e2n li \u0111\u1ed9c l\u1eadp. M\u1ed9t qu\u1ea7n th\u1ec3 th\u1ef1c v\u1eadt c\u00f3 t\u1ea7n s\u1ed1 c\u00e1c ki\u1ec3u gen \u1edf th\u1ebf h\u1ec7 xu\u1ea5t ph\u00e1t l\u00e0:<\/span><\/p>\n

\n

P:0,2AAbb: 0,7AaBb:0,1aabb<\/p>\n

Cho qu\u1ea7n th\u1ec3 n\u00e0y t\u1ef1 th\u1ee5 ph\u1ea5n qua 2 th\u1ebf h\u1ec7 th\u00ec t\u1ec9 l\u1ec7 c\u00e2y qu\u1ea3 \u0111\u1ecf, th\u00e2n th\u1ea5p \u1edf th\u1ebf h\u1ec7 F<\/p>\n

2<\/dd>\n

l\u00e0 bao nhi\u00eau?<\/p>\n

A. <\/strong>116\/640<\/span><\/p>\n

B. <\/strong>233\/640<\/span><\/p>\n

C. <\/strong>161\/640<\/span><\/p>\n

D. <\/strong>323\/144<\/span><\/p>\n<\/div>\n

C\u00e2u 16: (ID:94188)<\/strong>Cho bi\u1ebft trong qu\u00e1 tr\u00ecnh gi\u1ea3m ph\u00e2n c\u1ee7a c\u01a1 th\u1ec3 \u0111\u1ef1c c\u00f3 m\u1ed9t s\u1ed1 t\u1ebf b\u00e0o c\u00f3 c\u1eb7p NST mang c\u1eb7p gen Dd kh\u00f4ng ph\u00e2n li trong gi\u1ea3m ph\u00e2n I, gi\u1ea3m ph\u00e2n II di\u1ec5n ra b\u00ecnh th\u01b0\u1eddng c\u00e1c t\u1ebf b\u00e0o kh\u00e1c gi\u1ea3m ph\u00e2n b\u00ecnh th\u01b0\u1eddng .Trong qu\u00e1n tr\u00ecnh gi\u00e1m ph\u00e2n c\u1ee7a c\u00e1 th\u1ec3 c\u00e1i m\u1ed9t s\u1ed1 t\u1ebf b\u00e0o c\u00f3 c\u1eb7p NST mang c\u1eb7p gen Bb kh\u00f4ng ph\u00e2n li trong gi\u1ea3m ph\u00e2n II, gi\u1ea3m ph\u00e2n I di\u1ec5n ra b\u00ecnh th\u01b0\u1eddng c\u00e1c t\u1ebf b\u00e0o kh\u00e1c gi\u1ea3m ph\u00e2n b\u00ecnh th\u01b0\u1eddng .\u1ede \u0111\u1eddi con c\u1ee7a ph\u00e9p lai:\u2642AaBbDd x \u2640AaBbDd, s\u1ebd c\u00f3 t\u1ed1i \u0111a bao nhi\u00eau lo\u1ea1i ki\u1ec3u gen \u0111\u1ed9t bi\u1ebfn l\u1ec7ch b\u1ed9i v\u1ec1 c\u1eb7p NST n\u00f3i tr\u00ean ?<\/span><\/p>\n

\n

A. <\/strong>36<\/span><\/p>\n

B. <\/strong>24<\/span><\/p>\n

C. <\/strong>48<\/span><\/p>\n

D. <\/strong>72<\/span><\/p>\n<\/div>\n

C\u00e2u 17:<\/strong>(ID:94189)<\/strong>\u1ede ng\u01b0\u1eddi, t\u00ednh tr\u1ea1ng nh\u00f3m m\u00e1u ABO do 1 gen c\u00f3 3 alen I<\/span><\/p>\n

A<\/dd>\n

, I<\/span><\/p>\n

B<\/dd>\n

, I<\/span><\/p>\n

O<\/dd>\n

quy \u0111\u1ecbnh. Trong m\u1ed9t qu\u1ea7n th\u1ec3 \u0111ang c\u00e2n b\u1eb1ng v\u1ec1 di truy\u1ec1n c\u00f3 25% s\u1ed1 ng\u01b0\u1eddi mang nh\u00f3m m\u00e1u O, 39% s\u1ed1 ng\u01b0\u1eddi mang nh\u00f3m m\u00e1u A<\/span>.<\/strong>M\u1ed9t c\u1eb7p v\u1ee3 ch\u1ed3ng \u0111\u1ec1u c\u00f3 m\u00e1u B sinh m\u1ed9t ng\u01b0\u1eddi con, x\u00e1c su\u1ea5t \u0111\u1ec3 \u0111\u1ee9a con n\u00e0y mang nh\u00f3m m\u00e1u gi\u1ed1ng b\u1ed1 m\u1eb9<\/span><\/p>\n

\n

A.  <\/strong>3\/4<\/p>\n

B. <\/strong>25\/144<\/span><\/p>\n

C. <\/strong>19\/24<\/p>\n

D. <\/strong>119\/144<\/p>\n<\/div>\n

\n

C\u00e2u 18: (ID:94190)<\/strong>M\u1ed9t c\u00e1 th\u1ec3 \u1edf chu\u1ed9t c\u00f3 b\u1ed9 NST 2n=40. Khi quan s\u00e1t qu\u00e1 tr\u00ecnh gi\u1ea3m ph\u00e2n c\u1ee7a 3000 t\u1ebf b\u00e0o sinh tinh, ng\u01b0\u1eddi ta th\u1ea5y 30 t\u1ebf b\u00e0o c\u00f3 c\u1eb7p NST s\u1ed1 I kh\u00f4ng ph\u00e2n li trong gi\u1ea3m ph\u00e2n I, c\u00e1c s\u1ef1 ki\u1ec7n kh\u00e1c trong gi\u1ea3m ph\u00e2n di\u1ec5n ra b\u00ecnh th\u01b0\u1eddng.Lo\u1ea1i giao t\u1eed c\u00f3 20 NST chi\u1ebfm t\u1ec9 l\u1ec7<\/p>\n

A. <\/strong>99%<\/span><\/p>\n

B. <\/strong>45,5%<\/span><\/p>\n

C. <\/strong>40%<\/span><\/p>\n

D. <\/strong>80%<\/span><\/p>\n<\/div>\n

C\u00e2u 19:<\/strong>(ID:94191)<\/strong>M\u1ed9t gen c\u00f3 chi\u1ec1u d\u00e0i 408nm. Trong qu\u00e1 tr\u00ecnh d\u1ecbch m\u00e3 \u0111\u00e3 t\u1ed5ng h\u1ee3p n\u00ean 1 chu\u1ed7i polipeptit c\u00f3 320 axit amin. \u0110\u00e2y l\u00e0 gen c\u1ee7a nh\u00f3m sinh v\u1eadt n\u00e0o ?<\/span><\/p>\n

A. <\/strong>Virut<\/span><\/p>\n

B. <\/strong>N\u1ea5m<\/span><\/p>\n

C. <\/strong>Th\u1ec3 \u0103n khu\u1ea9n<\/span><\/p>\n

D. <\/strong>Vi khu\u1ea9n<\/span><\/p>\n

C\u00e2u 20:<\/strong>(ID:94192)<\/strong>\u1ede m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt, gi\u1ea3 thi\u1ebft h\u1ea1t ph\u1ea5n n+1, kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng th\u1ee5 tinh, no\u00e3n n+1 v\u1eabn th\u1ee5 tinh b\u00ecnh th\u01b0\u1eddng. Gen A quy \u0111\u1ecbnh h\u1ea1t m\u00e0u \u0111\u1ecf tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi gen a quy \u0111\u1ecbnh h\u1ea1t tr\u1eafng. Cho P: \u2642Aaa(2n+1) x Aaa(2n+1). T\u1ec9 l\u1ec7 ki\u1ec3u h\u00ecnh \u1edf \u0111\u1eddi F<\/span><\/p>\n

1<\/dd>\n

l\u00e0:<\/span><\/p>\n

A. <\/strong>5 \u0111\u1ecf:1 tr\u1eafng<\/span><\/p>\n

B. <\/strong>3 \u0111\u1ecf: 1 tr\u1eafng<\/span><\/p>\n

C. <\/strong>2 \u0111\u1ecf: 1 tr\u1eafng<\/span><\/p>\n

D. <\/strong>1 \u0111\u1ecf: 1 tr\u1eafng<\/span><\/p>\n

C\u00e2u 21:<\/strong>(ID:94193)<\/strong>Khi n\u00f3i v\u1ec1 m\u00f4i tr\u01b0\u1eddng v\u00e0 c\u00e1c nh\u00e2n t\u1ed1 sinh th\u00e1i, x\u00e9t c\u00e1c k\u1ebft lu\u1eadn sau \u0111\u00e2y<\/span><\/p>\n

\n

(1) M\u00f4i tr\u01b0\u1eddng s\u1ed1ng bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c nh\u00e2n t\u1ed1 xung quanh sinh v\u1eadt, c\u00f3 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp ho\u1eb7c gi\u00e1n ti\u1ebfp l\u00ean sinh v\u1eadt<\/p>\n

(2) M\u00f4i tr\u01b0\u1eddng cung c\u1ea5p ngu\u1ed3n s\u1ed1ng cho sinh v\u1eadt m\u00e0 kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 t\u1ed3n t\u1ea1i, sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n c\u1ee7a sinh v\u1eadt<\/p>\n

(3) \u1ede c\u00e1c lo\u00e0i k\u00ed sinh, c\u01a1 th\u1ec3 v\u1eadt ch\u1ee7 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00f4i tr\u01b0\u1eddng tr\u00ean c\u1ea1n  c\u1ee7a c\u00e1c sinh v\u1eadt k\u00ed sinh<\/p>\n

(4) Nh\u00e2n t\u1ed1 sinh th\u00e1i l\u00e0 t\u1ea5t c\u1ea3 nh\u1eefng nh\u00e2n t\u1ed1 m\u00f4i tr\u01b0\u1eddng kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n c\u1ee7a sinh v\u1eadt<\/p>\n

(5) M\u00f4i tr\u01b0\u1eddng tr\u00ean c\u1ea1n bao g\u1ed3m m\u1eb7t \u0111\u1ea5t v\u00e0 l\u1edbp kh\u00ed quy\u1ec3n, l\u00e0 n\u01a1i s\u1ed1ng ph\u1ea7n l\u1edbn sinh v\u1eadt tr\u00ean tr\u00e1i \u0111\u1ea5t<\/p>\n

C\u00f3 bao nhi\u00eau k\u1ebft lu\u1eadn \u0111\u00fang?<\/p>\n

A. <\/strong>1<\/span><\/p>\n

B. <\/strong>4<\/span><\/p>\n

C. <\/strong>3<\/span><\/p>\n

D. <\/strong>2<\/span><\/p>\n<\/div>\n

C\u00e2u 22: (ID:94194)<\/strong>Hai c\u1eb7p alen A, a, B,b t\u01b0\u01a1ng t\u00e1c b\u1ed5 sung v\u1edbi nhau quy \u0111\u1ecbnh h\u00ecnh d\u1ea1ng qu\u1ea3 theo t\u1ec9 l\u1ec7 9 d\u1eb9t: 6 tr\u00f2n: 1 d\u00e0i c\u00f2n alen D quy \u0111\u1ecbnh hoa m\u00e0u \u0111\u1ecf tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen d quy \u0111\u1ecbnh hoa m\u00e0u tr\u1eafng. C\u00e1c c\u1eb7p gen n\u1eb1m tr\u00ean c\u00e1c c\u1eb7p NST kh\u00e1c nhau. Cho c\u00e2y qu\u1ea3 d\u1eb9t, hoa \u0111\u1ecf t\u1ef1 th\u1ee5 ph\u1ea5n thu \u0111\u01b0\u1ee3c F<\/span><\/p>\n

2<\/dd>\n

c\u00f3 40 c\u00e2y qu\u1ea3 d\u00e0i, hoa tr\u1eafng. T\u00ednh theo l\u00fd thuy\u1ebft, s\u1ed1 l\u01b0\u1ee3ng c\u00e2y qu\u1ea3 d\u1eb9t hoa \u0111\u1ecf \u1edf F<\/span><\/p>\n

2<\/dd>\n

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

A. <\/strong>1200<\/span><\/p>\n

\n

B. <\/strong>240<\/p>\n

C. <\/strong>1080<\/p>\n

D. <\/strong>360<\/p>\n<\/div>\n

C\u00e2u 23:<\/strong>(ID:94195)<\/strong>Tr\u00ean ph\u00e2n t\u1eed ADN c\u00f3 bazo nito guanine tr\u1edf th\u00e0nh d\u1ea1ng hi\u1ebfm khi qua qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i s\u1ebd g\u00e2y \u0111\u1ed9t bi\u1ebfn thay th\u1ebf c\u1eb7p G-X th\u00e0nh c\u1eb7p A-T. S\u01a1 \u0111\u00f2 n\u00e0o sau \u0111\u00e2y m\u00f4 t\u1ea3 \u0111\u00fang c\u01a1 ch\u1ebf g\u00e2y \u0111\u1ed9t bi\u1ebfn l\u00e0m thay th\u1ebf c\u1eb7p G-X b\u1eb1ng c\u1eb7p A-T c\u1ee7a bazo nito d\u1ea1ng hi\u1ebfm ?<\/span><\/p>\n

A. <\/strong>G*-X \u2192 A-X \u2192 A-T<\/span><\/p>\n

\n

B. <\/strong>G*-X \u2192 T-X \u2192 A-T<\/p>\n

C. <\/strong>G*-X \u2192 G*-T \u2192 A-T<\/p>\n

D. <\/strong>G*-X \u2192 G*-A \u2192 A-T<\/p>\n<\/div>\n

C\u00e2u 24:<\/strong>(ID:94196)<\/strong>C\u00f3 4 qu\u1ea7n th\u1ec3 c\u1ee7a c\u00f9ng 1 lo\u00e0i c\u1ecf s\u1ed1ng \u1edf 4 m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau, qu\u1ea7n th\u1ec3 \u1edf m\u00f4i tr\u01b0\u1eddng n\u00e0o sau \u0111\u00e2y c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn nh\u1ea5t?<\/span><\/p>\n

\n

A. <\/strong>Qu\u1ea7n th\u1ec3 s\u1ed1ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 di\u1ec7n t\u00edch 834m<\/p>\n

2<\/dd>\n

v\u00e0 c\u00f3 m\u1eadt \u0111\u1ed9 34 c\u00e1 th\u1ec3\/ 1m<\/p>\n

3<\/dd>\n

.<\/p>\n

B. <\/strong>Qu\u1ea7n th\u1ec3 s\u1ed1ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 di\u1ec7n t\u00edch 2149 m<\/p>\n

2<\/dd>\n

v\u00e0 c\u00f3 m\u1eadt \u0111\u1ed9 11 c\u00e1 th\u1ec3\/1 m<\/p>\n

3<\/dd>\n

.<\/p>\n

C. <\/strong>Qu\u1ea7n th\u1ec3 s\u1ed1ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 di\u1ec7n t\u00edch 3049 m<\/p>\n

2<\/dd>\n

v\u00e0 c\u00f3 m\u1eadt \u0111\u1ed9 8 c\u00e1 th\u1ec3\/1 m<\/p>\n

3<\/dd>\n

.<\/p>\n

D. <\/strong>Qu\u1ea7n th\u1ec3 s\u1ed1ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 di\u1ec7n t\u00edch 800 m<\/p>\n

2<\/dd>\n

v\u00e0 c\u00f3 m\u1eadt \u0111\u1ed9 33 c\u00e1 th\u1ec3\/1 m<\/p>\n

3<\/dd>\n

.<\/p>\n

C\u00e2u 25: (ID:94197)<\/strong>Cho c\u00e2y Aa t\u1ef1 th\u1ee5 ph\u1ea5n, \u0111\u1eddi con xu\u1ea5t hi\u1ec7n m\u1ed9t c\u00e2y t\u1ee9 b\u1ed9i Aaaa.<\/strong>\u0110\u1ed9t bi\u1ebfn \u0111\u01b0\u1ee3c ph\u00e1t sinh \u1edf<\/p>\n

A.<\/strong>l\u1ea7n gi\u1ea3m ph\u00e2n 1 c\u1ee7a qu\u00e1 tr\u00ecnh t\u1ea1o giao t\u1eed \u1edf c\u1ea3 b\u1ed1 v\u00e0 m\u1eb9.<\/p>\n

B.<\/strong>l\u1ea7n nguy\u00ean ph\u00e2n \u0111\u1ea7u ti\u00ean c\u1ee7a h\u1ee3p t\u1eed.<\/p>\n

C.<\/strong>l\u1ea7n gi\u1ea3m ph\u00e2n 2 c\u1ee7a qu\u00e1 tr\u00ecnh t\u1ea1o giao t\u1eed \u1edf c\u1ea3 b\u1ed1 v\u00e0 m\u1eb9.<\/p>\n

D.<\/strong>l\u1ea7n gi\u1ea3m ph\u00e2n 1 c\u1ee7a gi\u1edbi n\u00e0y v\u00e0 gi\u1ea3m ph\u00e2n 2 c\u1ee7a gi\u1edbi kia.<\/strong><\/p>\n

C\u00e2u 26:<\/strong>(ID:94198)<\/strong>B\u1eb1ng ch\u1ee9ng n\u00e0o sau \u0111\u00e2y ph\u1ea3n \u00e1nh s\u1ef1 ti\u1ebfn h\u00f3a ph\u00e2n li?<\/p>\n

A.<\/strong>C\u00e1nh b\u01b0\u1edbm v\u00e0 c\u00e1nh chim. B.<\/strong>tuy\u1ebfn n\u01b0\u1edbc b\u1ecdt c\u1ee7a ch\u00f3 v\u00e0 tuy\u1ebfn n\u1ecdc \u0111\u1ed9c c\u1ee7a r\u1eafn.<\/p>\n

C.<\/strong>V\u00e2y c\u00e1 m\u1eadp v\u00e0 v\u00e2y c\u00e1 voi. D.<\/strong>Ch\u00e2n tr\u01b0\u1edbc chu\u1ed9t ch\u0169i v\u00e0 ch\u00e2n tr\u01b0\u1edbc d\u1ebf ch\u0169i.<\/p>\n

C\u00e2u 27:<\/strong>(ID:94199)<\/strong>X\u00e9t m\u1ed9t c\u1eb7p NST t\u01b0\u01a1ng \u0111\u1ed3ng ABCDE\/abcde. Khi gi\u1ea3m ph\u00e2n h\u00ecnh th\u00e0nh giao t\u1eed, th\u1ea5y xu\u1ea5t hi\u1ec7n lo\u1ea1i giao t\u1eed ABCcde. Nguy\u00ean nh\u00e2n l\u00e0m xu\u1ea5t hi\u1ec7n lo\u1ea1i giao t\u1eed n\u00e0y l\u00e0<\/p>\n

A.<\/strong>do s\u1ef1 ti\u1ebfp h\u1ee3p v\u00e0 trao \u0111\u1ed5i ch\u00e9o kh\u00f4ng c\u00e2n gi\u1eefa c\u00e1c cr\u00f4matit c\u00f9ng ngu\u1ed3n g\u1ed1c x\u1ea3y ra v\u00e0o k\u1ef3 \u0111\u1ea7u c\u1ee7a gi\u1ea3m ph\u00e2n.<\/p>\n

B.<\/strong>do s\u1ef1 ti\u1ebfp h\u1ee3p v\u00e0 trao \u0111\u1ed5i ch\u00e9o gi\u1eefa c\u00e1c cr\u00f4matit c\u00f9ng ngu\u1ed3n g\u1ed1c x\u1ea3y ra v\u00e0o k\u1ef3 \u0111\u1ea7u c\u1ee7a gi\u1ea3m ph\u00e2n I.<\/p>\n

C.<\/strong>do s\u1ef1 ti\u1ebfp h\u1ee3p v\u00e0 trao \u0111\u1ed5i ch\u00e9o gi\u1eefa c\u00e1c cr\u00f4matit kh\u00e1c ngu\u1ed3n g\u1ed1c x\u1ea3y ra v\u00e0o k\u1ef3 \u0111\u1ea7u c\u1ee7a gi\u1ea3m ph\u00e2n I.<\/p>\n

D.<\/strong>do s\u1ef1 ti\u1ebfp h\u1ee3p v\u00e0 trao \u0111\u1ed5i ch\u00e9o kh\u00f4ng c\u00e2n gi\u1eefa c\u00e1c cr\u00f4matit kh\u00e1c ngu\u1ed3n g\u1ed1c x\u1ea3y ra v\u00e0o k\u1ef3 \u0111\u1ea7u c\u1ee7a gi\u1ea3m ph\u00e2n.<\/p>\n

C\u00e2u 28:<\/strong>(ID:94200)<\/strong>\u1ede c\u00e0 chua c\u00f3 b\u1ed9 NST 2n = 24. M\u1ed9t th\u1ec3 \u0111\u1ed9t bi\u1ebfn b\u1ecb m\u1ea5t 1 \u0111o\u1ea1n NST s\u1ed1 3, \u0111\u1ea3o 1 \u0111o\u1ea1n NST \u1edf NST s\u1ed1 5 v\u00e0 l\u1eb7p 1 \u0111o\u1ea1n NST s\u1ed1 7 .Khi gi\u1ea3m ph\u00e2n b\u00ecnh th\u01b0\u1eddng s\u1ebd cho bao nhi\u00eau % giao t\u1eed kh\u00f4ng \u0111\u1ed9t bi\u1ebfn v\u1ec1 t\u1ea5t c\u1ea3 c\u00e1c c\u1eb7p NST?<\/p>\n<\/div>\n

A.<\/strong>12,5%.  <\/span><\/p>\n

\n

B.<\/strong>50%.    <\/p>\n

C.<\/strong>87,5%. <\/p>\n

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

C\u00e2u 29:<\/strong>(ID:94201)<\/strong>K\u1ebft lu\u1eadn n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang?<\/span><\/p>\n

\n

A.<\/strong>C\u00f9ng m\u1ed9t n\u01a1i \u1edf c\u00f3 th\u1ec3 ch\u1ee9a nhi\u1ec1u \u1ed5 sinh th\u00e1i \u0111\u1eb7c tr\u01b0ng cho t\u1eebng lo\u00e0i.<\/p>\n

B.<\/strong>Hai lo\u00e0i c\u00f3 \u1ed5 sinh th\u00e1i kh\u00f4ng tr\u00f9ng nhau th\u00ec kh\u00f4ng c\u1ea1nh tranh nhau.<\/p>\n

C.<\/strong>S\u1ef1 c\u1ea1nh tranh kh\u00e1c lo\u00e0i l\u00e0 nguy\u00ean nh\u00e2n ch\u00ednh l\u00e0m m\u1edf r\u1ed9ng \u1ed5 sinh th\u00e1i.<\/p>\n

D.<\/strong>S\u1ef1 tr\u00f9ng l\u1eb7p \u1ed5 sinh th\u00e1i l\u00e0 nguy\u00ean nh\u00e2n g\u00e2y ra s\u1ef1  c\u1ea1nh tranh gi\u1eefa c\u00e1c lo\u00e0i.<\/p>\n

C\u00e2u 30:<\/strong>(ID:94202)<\/strong>\u1ede m\u1ed9t lo\u00e0i \u0111\u1ed9ng v\u1eadt, cho giao ph\u1ed1i gi\u1eefa con \u0111\u1ef1c (XY) v\u1edbi con c\u00e1i (XX) \u0111\u1ec1u c\u00f3 l\u00f4ng \u0111\u1ecf thu \u0111\u01b0\u1ee3c F<\/p>\n

1<\/dd>\n

c\u00f3 t\u1ec9 l\u1ec7 3 \u0111\u1ecf : 1 tr\u1eafng (l\u00f4ng tr\u1eafng ch\u1ec9 xu\u1ea5t hi\u1ec7n \u1edf con c\u00e1i). Ch\u1ecdn m\u1ed9t c\u1eb7p l\u00f4ng \u0111\u1ecf \u1edf F<\/p>\n

1<\/dd>\n

cho giao ph\u1ed1i v\u1edbi nhau, x\u00e1c su\u1ea5t hi\u1ec7n 2 c\u00e1 th\u1ec3 l\u00f4ng \u0111\u1ecf \u1edf F<\/p>\n

2<\/dd>\n

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

A.<\/strong>3\/2<\/span><\/p>\n

\n

B.<\/strong>1\/2  <\/p>\n

C.<\/strong>25\/32  <\/p>\n

D.<\/strong>9\/16.<\/p>\n<\/div>\n

C\u00e2u 31:<\/strong>(ID:94203)<\/strong>C\u00e1c nh\u00e2n t\u1ed1 ti\u1ebfn h\u00f3a n\u00e0o l\u00e0m ngh\u00e8o v\u1ed1n gen c\u1ee7a qu\u1ea7n th\u1ec3?<\/span><\/p>\n

\n

A.<\/strong>\u0110\u1ed9t bi\u1ebfn, d\u1ecb nh\u1eadp gen. <\/p>\n

B.<\/strong>Ch\u1ecdn l\u1ecdc t\u1ef1 nhi\u00ean, \u0111\u1ed9t bi\u1ebfn.<\/p>\n

C.<\/strong>Giao ph\u1ed1i kh\u00f4ng ng\u1eabu nhi\u00ean, c\u00e1c y\u1ebfu t\u1ed1 ng\u1eabu nhi\u00ean. <\/p>\n

D.<\/strong>Bi\u1ebfn \u0111\u1ed9ng di truy\u1ec1n, di nh\u1eadp gen.<\/p>\n

C\u00e2u 32:<\/strong>(ID:94204)<\/strong>\u1ede m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt ch\u1ec9 sinh s\u1ea3n b\u1eb1ng t\u1ef1 th\u1ee5 ph\u1ea5n, c\u00e2y hoa \u0111\u1ecf sinh s\u1ea3n ra \u0111\u1eddi F<\/p>\n

1<\/dd>\n

c\u00f3 75% c\u00e2y hoa \u0111\u1ecf, 18.75% c\u00e2y hoa v\u00e0ng, 6.25% c\u00e2y hoa tr\u1eafng. N\u1ebfu l\u1ea5y t\u1ea5t c\u1ea3 c\u00e1c h\u1ea1t c\u00e2y hoa \u0111\u1ecf F<\/p>\n

1<\/dd>\n

\u0111em gieo ph\u00e1t tri\u1ec3n th\u00e0nh c\u00e2y F<\/p>\n

2<\/dd>\n

th\u00ec theo l\u00ed thuy\u1ebft, t\u1ec9 l\u1ec7 c\u00e2y hoa tr\u1eafng \u1edf F<\/p>\n

2<\/dd>\n

l\u00e0:<\/p>\n

A.<\/strong>1\/9         B.<\/strong>1\/16            C.<\/strong>1\/81                   D.<\/strong>\u00bc<\/p>\n

C\u00e2u 33:<\/strong>(ID:94205)<\/strong>Khi h\u1ecdc b\u00e0i: Qu\u1ea7n th\u1ec3 sinh v\u1eadt, hai h\u1ecdc sinh l\u00e0 Nam v\u00e0 An th\u1ea3o lu\u1eadn v\u1edbi nhau:<\/p>\n

– Nam cho r\u1eb1ng: Chu\u1ed3ng g\u00e0 nh\u00e0 m\u00ecnh l\u00e0 m\u1ed9t qu\u1ea7n th\u1ec3, v\u00ec c\u00f9ng lo\u00e0i, c\u00f9ng kh\u00f4ng gian s\u1ed1ng, c\u00f9ng th\u1eddi \u0111i\u1ec3m s\u1ed1ng, v\u1eabn giao ph\u1ed1i t\u1ea1o ra th\u1ebf h\u1ec7 g\u00e0 con h\u1eefu th\u1ee5.<\/p>\n

– An kh\u1eb3ng \u0111\u1ecbnh: kh\u00f4ng ph\u1ea3i l\u00e0 qu\u1ea7n th\u1ec3 v\u00e0 \u0111\u01b0a ra m\u1ed9t s\u1ed1 c\u00e1ch gi\u1ea3i th\u00edch. \u0110i\u1ec1u gi\u1ea3i th\u00edch n\u00e0o c\u1ee7a An l\u00e0 thuy\u1ebft ph\u1ee5c nh\u1ea5t?<\/p>\n

A.<\/strong>M\u1eadt \u0111\u1ed9 g\u00e0 trong chu\u1ed3ng nh\u00e0 b\u1ea1n kh\u00f4ng \u0111\u1ea3m b\u1ea3o nh\u01b0 trong t\u1ef1 nhi\u00ean n\u00ean kh\u00f4ng ph\u1ea3i l\u00e0 qu\u1ea7n th\u1ec3.<\/p>\n

B.<\/strong>L\u00e0 qu\u1ea7n th\u1ec3 khi c\u00e1c c\u00e1 th\u1ec3 t\u1ef1 thi\u1ebft l\u1eadp m\u1ed1i quan h\u1ec7 v\u1edbi nhau v\u00e0 v\u1edbi m\u00f4i tr\u01b0\u1eddng \u0111\u1ec3 th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng sinh h\u1ecdc.<\/strong><\/p>\n

C.<\/strong>G\u00e0 nh\u00e0 b\u1ea1n l\u00e0 do ng\u01b0\u1eddi cho \u0103n, ch\u1ee9 n\u00f3 kh\u00f4ng t\u1ef1 t\u00ecm ki\u1ebfm \u0111\u01b0\u1ee3c n\u00ean kh\u00f4ng ph\u1ea3i l\u00e0 qu\u1ea7n th\u1ec3.<\/p>\n

D.<\/strong>T\u1ef7 l\u1ec7 \u0111\u1ef1c\/c\u00e1i trong chu\u1ed3ng g\u00e0 nh\u00e0 b\u1ea1n kh\u00f4ng nh\u01b0 trong t\u1ef1 nhi\u00ean n\u00ean kh\u00f4ng ph\u1ea3i l\u00e0 qu\u1ea7n th\u1ec3.<\/p>\n

C\u00e2u 34:<\/strong>(ID:94206)<\/strong>Hai lo\u00e0i \u0111\u1ed9ng v\u1eadt A v\u00e0 B c\u00f9ng s\u1ed1ng trong m\u1ed9t m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean thay \u0111\u1ed5i m\u1ea1nh. Sau m\u1ed9t th\u1eddi gian d\u00e0i, qu\u1ea9n th\u1ec3 c\u1ee7a lo\u00e0i A \u0111\u00e3 ti\u1ebfn h\u00f3a th\u00e0nh lo\u00e0i A<\/p>\n

1<\/dd>\n

th\u00edch nghi h\u01a1n v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f2n qu\u1ea7n th\u1ec3 lo\u00e0i B c\u00f3 nguy c\u01a1 tuy\u1ec7t duy\u1ec7t. \u0110i\u1ec1u gi\u1ea3i th\u00edch n\u00e0o sau \u0111\u00e2y kh\u00f4ng h\u1ee3p l\u00fd?<\/p>\n

A.<\/strong>Lo\u00e0i A c\u00f3 t\u1ed1c \u0111\u1ed9 sinh s\u1ea3n ch\u1eadm h\u01a1n v\u00e0 chu k\u00ec s\u1ed1ng d\u00e0i h\u01a1n lo\u00e0i B.<\/strong><\/p>\n

B.<\/strong>Qu\u1ea7n th\u1ec3 c\u1ee7a lo\u00e0i A c\u00f3 kh\u1ea3 n\u0103ng th\u00edch nghi h\u01a1n qu\u1ea7n th\u1ec3 c\u1ee7a lo\u00e0i B.<\/strong><\/p>\n

C.<\/strong>Lo\u00e0i A c\u00f3 t\u1ed1c \u0111\u1ed9 sinh s\u1ea3n nhanh h\u01a1n v\u00e0 chu k\u00ec s\u1ed1ng ng\u1eafn h\u01a1n lo\u00e0i B.<\/strong><\/p>\n

D.<\/strong>Qu\u1ea7n th\u1ec3 c\u1ee7a lo\u00e0i A c\u00f3 t\u1ed1c \u0111\u1ed9 ph\u00e1t sinh v\u00e0 t\u00edch l\u0169y gen \u0111\u1ed9t bi\u1ebfn nhanh h\u01a1n lo\u00e0i B.<\/strong><\/p>\n

C\u00e2u 35: (ID:94207)<\/strong>Ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0o sau \u0111\u00e2y \u0111\u1ec3 ph\u00e1t hi\u1ec7n ra h\u1ed9i ch\u1ee9ng \u0110ao \u1edf ng\u01b0\u1eddi trong giai \u0111o\u1ea1n s\u1edbm, tr\u01b0\u1edbc sinh?<\/p>\n

A.<\/strong>Sinh thi\u1ebft tua nhau thai l\u1ea5y t\u1ebf b\u00e0o ph\u00f4i cho ph\u00e2n t\u00edch pr\u00f4t\u00eain<\/p>\n

B.<\/strong>Sinh thi\u1ebft tua nhau thai l\u1ea5y t\u1ebf b\u00e0o ph\u00f4i, ph\u00e2n t\u00edch ADN.<\/p>\n

C.<\/strong>Ch\u1ecdc d\u00f2 d\u1ecbch \u1ed1i l\u1ea5y t\u1ebf b\u00e0o ph\u00f4i cho ph\u00e2n t\u00edch NST gi\u1edbi t\u00ednh.<\/p>\n

D.<\/strong>Ch\u1ecdc d\u00f2 d\u1ecbch \u1ed1i l\u1ea5y t\u1ebf b\u00e0o ph\u00f4i cho ph\u00e2n t\u00edch NST th\u01b0\u1eddng.<\/p>\n

C\u00e2u 36:<\/strong>(ID:94208)<\/strong>\u1ede m\u1ed9t lo\u00e0i \u0111\u1ed9ng v\u1eadt c\u00f3 v\u00fa x\u00e9t 2 gen, gen th\u1ee9 1 c\u00f3 3 alen n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 (NST) th\u01b0\u1eddng, gen th\u1ee9 2 c\u00f3 5 alen n\u1eb1m \u1edf v\u00f9ng t\u01b0\u01a1ng \u0111\u1ed3ng c\u1ee7a NST gi\u1edbi t\u00ednh X. Theo l\u00fd thuy\u1ebft, qu\u00e1 tr\u00ecnh ng\u1eabu ph\u1ed1i c\u00f3 th\u1ec3 t\u1ea1o ra t\u1ed1i \u0111a bao nhi\u00eau lo\u1ea1i ki\u1ec3u gen d\u1ecb h\u1ee3p v\u1ec1 c\u1ea3 2 gen tr\u00ean?<\/p>\n<\/div>\n

A.<\/strong>60 <\/span><\/p>\n

\n

B.<\/strong>30    <\/p>\n

C.<\/strong>90 <\/p>\n

D.<\/strong>15<\/p>\n<\/div>\n

C\u00e2u 37:<\/strong>(ID:94209)<\/strong>\u1ede ng\u01b0\u1eddi, b\u1ec7nh phenylketo ni\u1ec7u do gen l\u1eb7n n\u1eb1m tr\u00ean NST th\u01b0\u1eddng quy \u0111\u1ecbnh (gen n\u00e0y c\u00f3 2 alen). C\u00f3 2 c\u00f4 g\u00e1i t\u00ean l\u00e0 Hoa v\u00e0 H\u1ed3ng \u0111\u1ec1u c\u00f3 b\u1ed1 b\u1ecb b\u1ec7nh phenylketo ni\u1ec7u, m\u1eb9 c\u1ee7a h\u1ecd kh\u00f4ng mang gen g\u00e2y b\u1ec7nh. H\u1ecd l\u1ea5y ch\u1ed3ng b\u00ecnh th\u01b0\u1eddng nh\u01b0ng c\u00f3 b\u1ed1 b\u1ecb b\u1ec7nh . Hoa sinh m\u1ed9t ng\u01b0\u1eddi con trai b\u00ecnh th\u01b0\u1eddng \u0111\u1eb7t t\u00ean l\u00e0 Ph\u00fa , H\u1ed3ng sinh m\u1ed9t con g\u00e1i b\u00ecnh th\u01b0\u1eddng \u0111\u1eb7t t\u00ean l\u00e0 Qu\u00fd. Ph\u00fa v\u00e0 Qu\u00fd l\u1ea5y nhau, X\u00e1c su\u1ea5t \u0111\u1ec3 sinh hai con b\u00ecnh th\u01b0\u1eddng l\u00e0 bao nhi\u00eau<\/span><\/p>\n

\n

A. <\/strong>29\/36<\/p>\n

B. <\/strong>27\/36<\/p>\n

C. <\/strong>32\/36<\/p>\n

D. <\/strong>64\/81<\/p>\n<\/div>\n

C\u00e2u 38:<\/strong>(ID:94210)<\/strong>N\u1ebfu c\u00f3 thi\u00ean tai hay s\u1ef1 c\u1ed1 l\u00e0m t\u0103ng v\u1ecdt t\u1ef7 l\u1ec7 ch\u1ebft c\u1ee7a qu\u1ea7n th\u1ec3, th\u00ec sau \u0111\u00f3 lo\u1ea1i qu\u1ea7n th\u1ec3 th\u01b0\u1eddng ph\u1ee5c h\u1ed3i nhanh nh\u1ea5t l\u00e0 qu\u1ea7n th\u1ec3 c\u00f3 t\u1ed1c \u0111\u1ed9 sinh s\u1ea3n cao v\u00e0 tu\u1ed5i th\u1ecd<\/span><\/p>\n

\n

A. <\/strong>trung b\u00ecnh th\u1ea5p <\/p>\n

B.<\/strong>  tu\u1ed5i sinh th\u00e1i cao <\/p>\n

C.<\/strong>tu\u1ed5i sinh l\u00ed th\u1ea5p <\/p>\n

D.<\/strong>tu\u1ed5i sinh th\u00e1i th\u1ea5p.<\/p>\n<\/div>\n

<\/strong><\/p>\n

\n

C\u00e2u 39:<\/strong>(ID:94211)<\/strong>C\u00e2u n\u00e0o d\u01b0\u1edbi \u0111\u00e2y n\u00f3i v\u1ec1 vai tr\u00f2 c\u1ee7a s\u1ef1 c\u00e1ch li \u0111\u1ecba l\u00fd trong qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh lo\u00e0i l\u00e0 \u0111\u00fang nh\u1ea5t?<\/p>\n

A. <\/strong>kh\u00f4ng c\u00f3 s\u1ef1 c\u00e1ch li \u0111\u1ecba l\u00fd th\u00ec kh\u00f4ng th\u1ec3 h\u00ecnh th\u00e0nh lo\u00e0i m\u1edbi.<\/p>\n

B. <\/strong>C\u00e1ch li \u0111\u1ecba l\u00fd lu\u00f4n lu\u00f4n d\u1eabn \u0111\u1ebfn c\u00e1ch li sinh s\u1ea3n.<\/p>\n

C. <\/strong>M\u00f4i tr\u01b0\u1eddng \u0111\u1ecba l\u00fd kh\u00e1c nhau l\u00e0 nguy\u00ean nh\u00e2n ch\u00ednh d\u1eabn \u0111\u1ebfn ph\u00e2n h\u00f3a th\u00e0nh ph\u1ea7n ki\u1ec3u gen c\u1ee7a c\u00e1c qu\u1ea7n th\u1ec3 c\u00e1ch li.<\/p>\n

D. <\/strong>C\u00e1ch li \u0111\u1ecba l\u00fd c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u00ecnh th\u00e0nh lo\u00e0i m\u1edbi qua nhi\u1ec1u giai \u0111o\u1ea1n trung gian chuy\u1ec3n ti\u1ebfp.<\/p>\n

C\u00e2u 40:<\/strong>(ID:94212)<\/strong>H\u00ecnh th\u1ee9c ph\u00e2n b\u1ed5 c\u00e1 th\u1ec3 \u0111\u1ed3ng \u0111\u1ec1u trong qu\u1ea7n th\u1ec3 c\u00f3 \u00fd ngh\u0129a sinh th\u00e1i g\u00ec?<\/p>\n

A. <\/strong>C\u00e1c c\u00e1 th\u1ec3 h\u1ed7 tr\u1ee3 nhau ch\u1ed1ng ch\u1ecdi v\u1edbi \u0111i\u1ec1u ki\u1ec7n b\u1ea5t l\u1ee3i c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

B. <\/strong>C\u00e1c c\u00e1 th\u1ec3 t\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c nhi\u1ec1u ngu\u1ed3n s\u1ed1ng t\u1eeb m\u00f4i tr\u01b0\u1eddng.<\/p>\n

C. <\/strong>C\u00e1c c\u00e1 th\u1ec3 c\u1ea1nh tranh nhau gay g\u1eaft gi\u00e0nh ngu\u1ed3n s\u1ed1ng.<\/p>\n

D. <\/strong>Gi\u1ea3m s\u1ef1 c\u1ea1nh tranh gay g\u1eaft gi\u1eefa c\u00e1c c\u00e1 th\u1ec3.<\/p>\n

C\u00e2u 41:<\/strong>(ID:94213)<\/strong>N\u1ed9i dung \u0111\u00fang khi n\u00f3i v\u1ec1 gen ph\u00e2n m\u1ea3nh:<\/p>\n

A. <\/strong>N\u1eb1m \u1edf l\u00f4cut x\u00e1c \u0111\u1ecbnh tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3, t\u1ed3n t\u1ea1i t\u1eebng c\u1eb7p alen trong t\u1ebf b\u00e0o l\u01b0\u1ee1ng b\u1ed9i.<\/p>\n

B. <\/strong>M\u1ed7i gen phi\u00ean m\u00e3 1 l\u1ea7n s\u1ebd t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c nhi\u1ec1u ph\u00e2n t\u1eeb ARN tr\u01b0\u1edfng th\u00e0nh.<\/p>\n

C. <\/strong>L\u00e0 thu\u1eadn ng\u1eef d\u00f9ng \u0111\u1ec3 ch\u1ec9 t\u1ea5t c\u1ea3 c\u00e1c gen \u1edf sinh v\u1eadt nh\u00e2n th\u1ef1c.<\/strong><\/p>\n

D. <\/strong>Khi phi\u00ean m\u00e3, c\u00e1c intron kh\u00f4ng m\u00e3 h\u00f3a th\u00f4ng tin tr\u00ean mARN tr\u01b0\u1edfng th\u00e0nh<\/p>\n

C\u00e2u 42:<\/strong>(ID:942114)<\/strong>C\u00e1c nguy\u00ean nh\u00e2n g\u00e2y ra bi\u1ebfn \u0111\u1ed9ng s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 c\u1ee7a qu\u1ea7n th\u1ec3:<\/p>\n

1 \u2013 do thay \u0111\u1ed5i nh\u00e2n t\u1ed1 sinh th\u00e1i v\u00f4 sinh.<\/p>\n

2 \u2013 do thay \u0111\u1ed5i t\u1eadp qu\u00e1n ki\u1ebfm m\u1ed3i c\u1ee7a sinh v\u1eadt.<\/p>\n

3 \u2013 do thay \u0111\u1ed5i nh\u00e2n t\u1ed1 sinh th\u00e1i h\u1eefu sinh.<\/p>\n

4 \u2013 do s\u1ef1 l\u1edbn l\u00ean c\u1ee7a c\u00e1c c\u00e1 th\u1ec3 c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n

Ph\u01b0\u01a1ng \u00e1n cu\u1ed1i c\u00f9ng : <\/p>\n<\/div>\n

A.<\/strong>1,3   <\/span><\/p>\n

\n

B.<\/strong>1,2  <\/p>\n

C.<\/strong>1,2,3,4 <\/p>\n

D<\/strong>2,4.<\/p>\n<\/div>\n

C\u00e2u 43:<\/strong>(ID:94215)<\/strong>Nu\u00f4i c\u1ea5y h\u1ea1t ph\u00e2n c\u1ee7a c\u01a1 th\u1ec3  AaBbDDEe. Sau \u0111\u00f3 l\u01b0\u1ee3ng h\u1ed1i h\u00f3a th\u00e0nh gi\u1ed1ng thu\u1ea7n ch\u1ee7ng. Theo l\u00fd thuy\u1ebft s\u1ebd t\u1ea1o ra \u0111\u01b0\u1ee3c t\u1ed1i \u0111a bao gi\u1ed1ng gi\u1ed1ng m\u1edbi:<\/span><\/p>\n

A.<\/strong>4 gi\u1ed1ng.        B.<\/strong>16 gi\u1ed1ng             C.<\/strong>1 gi\u1ed1ng    D.<\/strong>  8 gi\u1ed1ng<\/p>\n

C\u00e2u 44:<\/strong>(ID:94216)<\/strong>C\u00e1c nh\u00e2n t\u1ed1 n\u00e0o sau \u0111\u00e2y c\u00f9ng v\u1edbi m\u1ed1i quan h\u1ec7 c\u1ee7a n\u00f3 tham gia qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh lo\u00e0i m\u1edbi ?<\/p>\n

A.<\/strong>\u0110\u1ed9t bi\u1ebfn,giao ph\u1ed1i,ch\u1ecdn l\u1ecdc t\u1ef1 nhi\u00ean,ph\u00e2n li t\u00ecnh tr\u1ea1ng<\/p>\n

B.<\/strong>\u0110\u1ed9t bi\u1ebfn,giao ph\u1ed1i,ch\u1ecdn  l\u1ecdc t\u1ef1 nhi\u00ean ,c\u00e1c c\u01a1 ch\u1ebf c\u00e1ch li<\/p>\n

C.<\/strong>Bi\u1ebfn d\u1ecb, giao ph\u1ed1i,ch\u1ecdn l\u1ecdc t\u1ef1 nhi\u00ean,c\u00e1c c\u01a1 ch\u1ebf c\u00e1ch li<\/p>\n

D.<\/strong>Bi\u1ebfn d\u1ecb,di truy\u1ec1n,ch\u1ecdn l\u1ecdc t\u1ef1 nhi\u00ean,ph\u00e2n li t\u00ecnh tr\u1ea1ng<\/p>\n

C\u00e2u 45:<\/strong>(ID:94217)<\/strong>Trong m\u1ed9t khu b\u1ea3o t\u1ed3n c\u00f3 di\u1ec7n t\u00edch l\u00e0 6000ha, ng\u01b0\u1eddi ta theo d\u00f5i s\u1ed1 l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t qu\u1ea7n th\u1ec3 ch\u00ecm v\u00e0o n\u0103m th\u1ee9 nh\u1ea5t ghi nh\u1eadn \u0111\u01b0\u1ee3c m\u1eadt \u0111\u1ed9 c\u00e1 th\u1ec3 trong m\u1ed9t qu\u1ea7n th\u1ec3 l\u00e0 0,25 c\u00e1 th\u1ec3\/ha.<\/strong>\u0110\u1ebfn n\u0103m th\u1ee9 2 \u0111\u1ebfm \u0111\u01b0\u1ee3c s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 c\u1ee7a qu\u1ea7n th\u1ec3 l\u00e0 1605 c\u00e1 th\u1ebb.H\u00e3y t\u00ednh t\u1ec9 l\u1ec7 sinh s\u1ea3n c\u1ee7a qu\u1ea7n th\u1ec3.Bi\u1ebft t\u1ec9 l\u1ec7 t\u1eed vong c\u1ee7a qu\u1ea7n th\u1ec3 l\u00e0 2%\/n\u0103m, t\u1ec9 l\u1ec7 xu\u1ea5t c\u01b0 c\u1ee7a qu\u1ea7n th\u1ec3 1%\/n\u0103m.<\/p>\n

A. <\/strong>12%           B.<\/strong>10%            C.<\/strong>14%        D.<\/strong>11%<\/p>\n

C\u00e2u 46:<\/strong>(ID:94218)<\/strong>\u0110\u1ec3 t\u1ea1o \u0111\u1ed9ng v\u1eadt chuy\u1ec3n gen, ng\u01b0\u1eddi ta th\u01b0\u1eddng d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p vi ti\u00eam \u0111\u1ec3 ti\u00eam gen v\u00e0o h\u1ee3p t\u1eed, sau \u0111\u00f3 h\u1ee3p t\u1eed ph\u00e1t tri\u1ec3n th\u00e0nh ph\u00f4i, chuy\u1ec3n ph\u00f4i v\u00e0o t\u1eeb cung con c\u00e1i. Vi\u1ec7c ti\u00eam gen v\u00e0o h\u1ee3p t\u1eed \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n khi<\/p>\n

A. <\/strong>h\u1ee3p t\u1eed b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n th\u00e0nh ph\u00f4i.  <\/p>\n

B. <\/strong>tinh tr\u00f9ng b\u1eaft \u0111\u1ea7u th\u1ee5 tinh v\u1edbi tr\u1ee9ng<\/p>\n

C. <\/strong>c\u00e1 nh\u00e2n c\u1ee7a tinh tr\u00f9ng \u0111\u00e3 \u0111i v\u00e0o tr\u1ee9ng nh\u01b0ng ch\u01b0a h\u00f2a h\u1ee3p v\u1edbi nh\u00e2n c\u1ee7a tr\u1ee9ng.<\/p>\n

D. <\/strong>h\u1ee3p  t\u1eed \u0111\u00e3 ph\u00e1t tri\u1ec3n th\u00e0nh ph\u00f4i.<\/p>\n

C\u00e2u 47.<\/strong>(ID:94219)<\/strong>Cho bi\u1ebft m\u1ed7i c\u1eb7p t\u00ednh tr\u1ea1ng do m\u1ed9t c\u1eb7p gen quy \u0111\u1ecbnh v\u00e0 tr\u1ed9i ho\u00e0n to\u00e0n. T\u1ea7n s\u1ed1 ho\u00e1n v\u1ecb gi\u1eefa A v\u00e0 B l\u00e0 20%. X\u00e9t ph\u00e9p lai AB\/ab X<\/p>\n

D<\/dd>\n

X<\/p>\n

d<\/dd>\n

x Ab\/ab X<\/p>\n

D<\/dd>\n

Y.Thep l\u00ed thuy\u1ebft th\u00ec ki\u1ec3u h\u00ecnh aaB-D- \u1edf \u0111\u1eddi con chi\u1ebfm t\u1ec9 l\u1ec7 bao nhi\u00eau %?<\/p>\n

A. <\/strong>3,75%         B.<\/strong>75%         C.<\/strong>5,25         D.<\/strong>5,0%<\/p>\n

C\u00e2u 48:<\/strong>(ID:94220)<\/strong>\u0110i\u1ec1u kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2ykh\u00f4ng \u0111\u00fang<\/strong>?<\/p>\n

A. <\/strong>Khi m\u1ed9t gen \u0111a hi\u1ec7u b\u1ecb \u0111\u1ed9t bi\u1ebfn s\u1ebd \u0111\u1ed3ng th\u1eddi k\u00e9o theo s\u1ef1 bi\u1ebf d\u1ef1 \u1edf c\u00e1c t\u00ecnh tr\u1ea1ng m\u00e0 gen \u0111\u00f3 chi ph\u1ed1i.<\/p>\n

B. <\/strong>Ki\u1ec3u gen l\u00e0 m\u1ed9t t\u1ed5 h\u1ee3p g\u1ed3m nh\u1eefng gen t\u00e1c \u0111\u1ed9ng ri\u00eang r\u1ebd.<\/p>\n

C. <\/strong>Ngo\u00e0i s\u1ef1 t\u00e1c \u0111\u1ed9ng qua l\u1ea1i gi\u1eefa c\u00e1c gen trong c\u1eb7p alen c\u00f2n c\u00f3 t\u00e1c \u0111\u1ed9ng gi\u1eefa c\u00e1c gen kh\u00f4ng alen \u0111\u1ec3 chi ph\u1ed1i m\u1ed9t t\u00ednh tr\u1ea1ng.<\/p>\n

D. <\/strong>Ki\u1ec3u h\u00ecnh l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a s\u1ef1 t\u00e1c \u0111\u1ed9ng qua l\u1ea1i gi\u1eefa c\u00e1c gen v\u00e0 m\u00f4i tr\u01b0\u1eddng s\u1ed1ng.<\/p>\n

C\u00e2u 49.<\/strong>(ID:94221)<\/strong>C\u00e2y hoa \u0111\u1ecf t\u1ef1 th\u1ee5 ph\u1ea5n, \u0111\u1eddi F<\/p>\n

1<\/dd>\n

c\u00f3 t\u1ec9 l\u1ec7 9 c\u00e2y hoa \u0111\u1ecf : 7 c\u00e2y hoa tr\u1eafng. Cho t\u1ea5t c\u1ea3 c\u00e1c c\u00e2y hoa \u0111\u1ecf F<\/p>\n

1<\/dd>\n

giao ph\u1ea5n ng\u1eabu nhi\u00ean th\u00ec t\u1ec9 l\u1ec7 ki\u1ec3u h\u00ecnh \u1edf F<\/p>\n

2<\/dd>\n

s\u1ebd l\u00e0<\/p>\n

A. <\/strong>9 hoa \u0111\u1ecf: 7 hoa tr\u1eafng.              B.<\/strong>64 hoa \u0111\u1ecf: 36 hoa tr\u1eafng.                          <\/p>\n

C.<\/strong>64 hoa \u0111\u1ecf: 17 hoa tr\u1eafng<\/span>.               D<\/strong>. 35 hoa \u0111\u1ecf: 1 hoa tr\u1eafng.<\/span><\/p>\n

C\u00e2u 50:<\/strong>(ID:94222)<\/strong>N\u1ed9i dung n\u00e0o sau \u0111\u00e2ysai<\/strong>khi n\u00f3i \u0111\u1ebfn l\u1ecbch s\u1eed ph\u00e1t tri\u1ec3n c\u1ee7a sinh gi\u1edbi?<\/p>\n

A. <\/strong>S\u1ef1 bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec1u ki\u1ec7n \u0111\u1ecba ch\u1ea5t, khi h\u1eadu th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn bi\u1ebfn \u0111\u1ed5i tr\u01b0\u1edbc h\u1ebft \u1edf th\u1ef1c v\u1eadt, sau \u0111\u00f3 \u0111\u1ebfn \u0111\u1ed9ng v\u1eadt.<\/p>\n

B. <\/strong>Sinh gi\u1edbi ph\u00e1t tri\u1ec3n ch\u1ee7 y\u1ebfu do t\u00e1c \u0111\u1ed9ng c\u1ee7a \u0111i\u1ec1u ki\u1ec7n \u0111\u1ecba ch\u1ea5t v\u00e0 kh\u00ed h\u1eadu, kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u1ecdn l\u1ecdc t\u1ef1 nhi\u00ean.<\/p>\n

C. <\/strong>S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a sinh gi\u1edbi di\u1ec5n ra nhanh h\u01a1n s\u1ef1 thay \u0111\u1ed5i ch\u1eadm ch\u1ea1p c\u1ee7a  \u0111i\u1ec1u ki\u1ec7n kh\u00ed h\u1eadu, \u0111\u1ecba ch\u1ea5t.<\/p>\n

D. <\/strong>C\u00e1c nh\u00f3m sinh v\u1eadt th\u00edch nghi \u0111\u01b0\u1ee3c v\u1edbi m\u00f4i tr\u01b0\u1eddng s\u1ebd ph\u00e1t tri\u1ec3n nhanh h\u01a1n v\u00e0 chi\u1ebfm \u01b0u th\u1ebf.<\/p>\n

\u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh n\u0103m 2016- \u0111\u1ec1 s\u1ed1 6<\/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 n\u0103m 2016 t\u1ed5 ch\u1ee9c thi l\u1ea7n th\u1ee9 6 bao g\u1ed3m 50 c\u00e2u h\u1ecfi v\u00e0 c\u00f3 \u0111\u00e1p \u00e1n h\u01b0\u1edbng d\u1eabn tr\u1ea3 l\u1eddi b\u00ean d\u01b0\u1edbi Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh C\u00e2u 1: (ID:94173)\u1ede vi khu\u1ea9n, m\u1ed9t gen b\u00ecnh th\u01b0\u1eddng \u0111i\u1ec1u khi\u1ec3n t\u1ed5ng h\u1ee3p 1 […]<\/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