\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh \u0111\u1ec1 s\u1ed1 1 c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft n\u0103m 2016, c\u00e1c em xem chi ti\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/strong><\/h2>\n

\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh n\u0103m 2016 – \u0110\u1ec1 s\u1ed1 1<\/strong><\/h3>\n

Tr\u1eafc nghi\u1ec7m kh\u00e1ch quan:<\/strong> H\u00e3y khoanh tr\u00f2n v\u00e0o ph\u01b0\u01a1ng \u00e1n \u0111\u00fang nh\u1ea5t:<\/em><\/p>\n

C\u00e2u 1:<\/strong>(ID: 94695)<\/strong>B\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p t\u1ebf b\u00e0o h\u1ecdc, ng\u01b0\u1eddi ta x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c trong c\u00e1c t\u1ebf b\u00e0o sinh d\u01b0\u1ee1ng c\u1ee7a m\u1ed9t c\u00e2y \u0111\u1ec1u c\u00f3 60 nhi\u1ec5m s\u1eafc th\u1ec3 v\u00e0 kh\u1eb3ng \u0111\u1ecbnh c\u00e2y n\u00e0y l\u00e0 th\u1ec3 ng\u0169 b\u1ed9i (5n). C\u01a1 s\u1edf khoa h\u1ecdc c\u1ee7a kh\u1eb3ng \u0111\u1ecbnh tr\u00ean l\u00e0<\/p>\n

A.<\/strong>s\u1ed1 nhi\u1ec5m s\u1eafc th\u1ec3 trong t\u1ebf b\u00e0o l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a 5 n\u00ean b\u1ed9 nhi\u1ec5m s\u1eafc th\u1ec3 1n = 12 v\u00e0 5n = 60.<\/p>\n

B.<\/strong>c\u00e2y n\u00e0y sinh tr\u01b0\u1edfng nhanh, ph\u00e1t tri\u1ec3n m\u1ea1nh v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu t\u1ed1t.<\/p>\n

C.<\/strong>c\u00e1c nhi\u1ec5m s\u1eafc th\u1ec3 t\u1ed3n t\u1ea1i th\u00e0nh c\u1eb7p t\u01b0\u01a1ng \u0111\u1ed3ng g\u1ed3m 2 chi\u1ebfc c\u00f3 h\u00ecnh d\u1ea1ng, k\u00edch th\u01b0\u1edbc gi\u1ed1ng nhau.<\/p>\n

D.<\/strong>khi so s\u00e1nh v\u1ec1 h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a c\u00e1c nhi\u1ec5m s\u1eafc th\u1ec3 trong t\u1ebf b\u00e0o, ng\u01b0\u1eddi ta th\u1ea5y ch\u00fang
t\u1ed3n t\u1ea1i th\u00e0nh t\u1eebng nh\u00f3m, m\u1ed7i nh\u00f3m g\u1ed3m 5 nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1ed1ng nhau v\u1ec1 h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc.<\/p>\n

C\u00e2u 2:<\/strong>(ID: 94696)<\/strong>Trong l\u1ecbch s\u1eed ph\u00e1t tri\u1ec3n c\u1ee7a sinh gi\u1edbi qua c\u00e1c \u0111\u1ea1i \u0111\u1ecba ch\u1ea5t, \u1edf k\u1ec9 Tam \u0111i\u1ec7p (Triat) c\u00f3 l\u1ee5c \u0111\u1ecba chi\u1ebfm \u01b0u th\u1ebf, kh\u00ed h\u1eadu kh\u00f4. \u0110\u1eb7c \u0111i\u1ec3m sinh v\u1eadt \u0111i\u1ec3n h\u00ecnh \u1edf k\u1ec9 n\u00e0y l\u00e0:<\/p>\n

A.<\/strong>C\u00e2y h\u1ea1t tr\u1ea7n ng\u1ef1 tr\u1ecb. Ph\u00e2n ho\u00e1 b\u00f2 s\u00e1t c\u1ed5. C\u00e1 x\u01b0\u01a1ng ph\u00e1t tri\u1ec3n. Ph\u00e1t sinh th\u00fa v\u00e0 chim.<\/p>\n

B.<\/strong>C\u00e2y h\u1ea1t tr\u1ea7n ng\u1ef1 tr\u1ecb. B\u00f2 s\u00e1t c\u1ed5 ng\u1ef1 tr\u1ecb. Ph\u00e2n ho\u00e1 chim.<\/p>\n

C.<\/strong>D\u01b0\u01a1ng x\u1ec9 ph\u00e1t tri\u1ec3n m\u1ea1nh. Th\u1ef1c v\u1eadt c\u00f3 h\u1ea1t xu\u1ea5t hi\u1ec7n. L\u01b0\u1ee1ng c\u01b0 ng\u1ef1 tr\u1ecb. Ph\u00e1t sinh b\u00f2 s\u00e1t.<\/p>\n

D.<\/strong>Ph\u00e2n ho\u00e1 c\u00e1 x\u01b0\u01a1ng. Ph\u00e1t sinh l\u01b0\u1ee1ng c\u01b0 v\u00e0 c\u00f4n tr\u00f9ng.<\/p>\n

C\u00e2u 3:<\/strong>(ID: 94697)<\/strong>Trong c\u00e1c m\u1ed1i quan h\u1ec7 duy tr\u00ec tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng trong qu\u1eabn x\u00e3, m\u1ed1i quan h\u1ec7 th\u1ec3 hi\u1ec7n vai tr\u00f2 r\u00f5 r\u1ec7t nh\u1ea5t l\u00e0:<\/p>\n

A.<\/strong>Sinh v\u1eadt n\u00e0y \u0103n sinh v\u1eadt kh\u00e1c.            B.<\/strong>K\u00ed sinh – v\u1eadt ch\u1ee7.<\/p>\n

C.<\/strong>\u1ee8c ch\u1ebf – c\u1ea3m nhi\u1ec5m.                 D.<\/strong>C\u1ed9ng sinh.<\/p>\n

C\u00e2u 4:<\/strong>(ID: 94698)<\/strong>Trong qu\u1ea7n th\u1ec3 c\u1ee7a m\u1ed9t lo\u00e0i, x\u00e9t 3 gen: gen 1 c\u00f3 2 alen, gen 2 c\u00f3 3 alen, gen 3 c\u00f3 5 alen. Gen 1 v\u00e0 gen 2 \u0111\u1ec1u n\u1eb1m tr\u00ean \u0111o\u1ea1n kh\u00f4ng t\u01b0\u01a1ng \u0111\u1ed3ng c\u1ee7a NST X v\u00e0 c\u00e1c alen c\u1ee7a 2 gen n\u00e0y li\u00ean k\u1ebft kh\u00f4ng ho\u00e0n to\u00e0n. Gen 3 n\u1eb1m tr\u00ean NST th\u01b0\u1eddng. T\u00ednh theo l\u00ed thuy\u1ebft s\u1ed1 ki\u1ec3u gen t\u1ed1i \u0111a trong qu\u1ea7n th\u1ec3 n\u00e0y l\u00e0 bao nhi\u00eau ? Bi\u1ebft r\u1eb1ng kh\u00f4ng x\u1ea3y ra \u0111\u1ed9t bi\u1ebfn.<\/p>\n

A.<\/strong>405           B.<\/strong>27           C.<\/strong>270           D.<\/strong>15<\/p>\n

<\/p>\n

C\u00e2u 10:<\/strong>(ID: 94865)<\/strong>\u1ede m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt, t\u00ednh tr\u1ea1ng chi\u1ec1u cao c\u00e2y do ba c\u1eb7p gen kh\u00f4ng alen l\u00e0 A,a; B,b v\u00e0 D,d c\u00f9ng quy \u0111\u1ecbnh theo ki\u1ec3u t\u01b0\u01a1ng t\u00e1c c\u1ed9ng g\u1ed9p. Trong ki\u1ec3u gen n\u1ebfu c\u1ee9 c\u00f3 m\u1ed9t alen tr\u1ed9i th\u00ec chi\u1ec1u cao c\u00e2y t\u0103ng th\u00eam 5cm. Khi tr\u01b0\u1edfng th\u00e0nh, c\u00e2y th\u1ea5p nh\u1ea5t c\u00f3 chi\u1ec1u cao 150cm. Theo l\u00ed thuy\u1ebft, ph\u00e9p lai AaBbDd \u00d7 AaBbDd cho \u0111\u1eddi con c\u00f3 s\u1ed1 c\u00e2y cao 170cm chi\u1ebfm t\u1ec9 l\u1ec7<\/p>\n

A.<\/strong>1\/64.           B.<\/strong>5\/16.         C.<\/strong>3\/32.         D.<\/strong>15\/64.<\/p>\n

C\u00e2u 11:<\/strong>(ID: 94866)<\/strong>\u0110\u1ec3 t\u1ea1o ra \u0111\u1ed9ng v\u1eadt chuy\u1ec3n gen, ng\u01b0\u1eddi ta \u0111\u00e3 ti\u1ebfn h\u00e0nh<\/p>\n

A.<\/strong>\u0111\u01b0a gen c\u1ea7n chuy\u1ec3n v\u00e0o c\u00e1 th\u1ec3 c\u00e1i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p vi ti\u00eam (ti\u00eam gen) v\u00e0 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho gen \u0111\u01b0\u1ee3c bi\u1ec3u hi\u1ec7n.<\/p>\n

B.<\/strong>\u0111\u01b0a gen c\u1ea7n chuy\u1ec3n v\u00e0o c\u01a1 th\u1ec3 con v\u1eadt m\u1edbi \u0111\u01b0\u1ee3c sinh ra v\u00e0 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho gen \u0111\u00f3 \u0111\u01b0\u1ee3c bi\u1ec3u hi\u1ec7n.<\/p>\n

C.<\/strong>\u0111\u01b0a gen c\u1ea7n chuy\u1ec3n v\u00e0o ph\u00f4i \u1edf giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n mu\u1ed9n \u0111\u1ec3 t\u1ea1o ra con mang gen c\u1ea7n chuy\u1ec3n v\u00e0 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho gen \u0111\u00f3 \u0111\u01b0\u1ee3c bi\u1ec3u hi\u1ec7n.<\/p>\n

D.<\/strong>l\u1ea5y tr\u1ee9ng c\u1ee7a con c\u00e1i r\u1ed3i cho th\u1ee5 tinh trong \u1ed1ng nghi\u1ec7m, sau \u0111\u00f3 \u0111\u01b0a gen v\u00e0o h\u1ee3p t\u1eed (\u1edf giai \u0111o\u1ea1n nh\u00e2n non), cho h\u1ee3p t\u1eed ph\u00e1t tri\u1ec3n th\u00e0nh ph\u00f4i r\u1ed3i c\u1ea5y ph\u00f4i \u0111\u00e3 chuy\u1ec3n gen v\u00e0o t\u1eed cung con c\u00e1i.<\/p>\n

C\u00e2u 12:<\/strong>(ID: 94867)<\/strong>N\u1ebfu k\u00edch th\u01b0\u1edbc c\u1ee7a qu\u1ea7n th\u1ec3 gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi m\u1ee9c t\u1ed1i thi\u1ec3u th\u00ec qu\u1ea7n th\u1ec3 s\u1ebd r\u01a1i v\u00e0o tr\u1ea1ng th\u00e1i suy gi\u1ea3m d\u1eabn t\u1edbi di\u1ec7t vong. Nh\u1eefng l\u00ed do n\u00e0o trong s\u1ed1 nh\u1eefng l\u00ed do d\u01b0\u1edbi \u0111\u00e2y gi\u1ea3i th\u00edch cho hi\u1ec7n t\u01b0\u1ee3ng tr\u00ean?<\/p>\n

(1) Khi s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 qu\u00e1 \u00edt, s\u1ef1 h\u1ed7 tr\u1ee3 gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 b\u1ecb gi\u1ea3m, qu\u1ea7n th\u1ec3 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecdi v\u1edbi nh\u1eefng thay \u0111\u1ed5i c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

(2) Khi s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 qu\u00e1 \u00edt, qu\u1ea7n th\u1ec3 d\u1ec5 ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 ng\u1eabu nhi\u00ean l\u00e0m gi\u1ea3m s\u1ef1 \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n

(3) Khi s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 qu\u00e1 \u00edt, kh\u1ea3 n\u0103ng sinh s\u1ea3n gi\u1ea3m do c\u01a1 h\u1ed9i g\u1eb7p nhau c\u1ee7a c\u00e1c c\u00e1 th\u1ec3 \u0111\u1ef1c v\u00e0 c\u00e1i \u00edt.<\/p>\n

(4) Khi s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 qu\u00e1 \u00edt, s\u1ef1 giao ph\u1ed1i g\u1ea7n th\u01b0\u1eddng x\u1ea3y ra l\u00e0m cho c\u00e1c gen l\u1eb7n c\u00f3 h\u1ea1i c\u00f3 c\u01a1 h\u1ed9i bi\u1ec3u hi\u1ec7n v\u1edbi t\u1ea7n s\u1ed1 cao h\u01a1n, \u0111e do\u1ea1 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n

A.<\/strong>(1); (2); (4).       B.<\/strong>(1); (4); (3).      C.<\/strong>(1); (2); (3); (4).    D.<\/strong>(3); (2); (4).<\/p>\n

C\u00e2u 13:<\/strong>(ID: 94868)<\/strong>Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y \u0111\u00fang?<\/p>\n

A.<\/strong>Trong ph\u00e2n t\u1eed ARN c\u00f3 ch\u1ee9a g\u1ed1c \u0111\u01b0\u1eddng C<\/p>\n

5<\/dd>\n

H<\/p>\n

10<\/dd>\n

O<\/p>\n

5<\/dd>\n

v\u00e0 c\u00e1c baz\u01a1 nitric A, T, G, X.<\/p>\n

B.<\/strong>M\u1ed9t b\u1ed9 ba m\u00e3 di truy\u1ec1n c\u00f3 th\u1ec3 m\u00e3 ho\u00e1 cho m\u1ed9t ho\u1eb7c m\u1ed9t s\u1ed1 axit amin.<\/p>\n

C.<\/strong>\u1ede sinh v\u1eadt nh\u00e2n chu\u1ea9n, axit amin m\u1edf \u0111\u1ea7u chu\u1ed7i p\u00f4lipeptit s\u1ebd \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p l\u00e0 meti\u00f4nin.<\/p>\n

D.<\/strong>Ph\u00e2n t\u1eed tARN v\u00e0 rARN c\u00f3 c\u1ea5u tr\u00fac m\u1ea1ch \u0111\u01a1n, ph\u00e2n t\u1eed mARN c\u00f3 c\u1ea5u tr\u00fac m\u1ea1ch k\u00e9p.<\/p>\n

C\u00e2u 14:<\/strong>(ID: 94869)<\/strong>Tr\u00ean m\u1ed9t nhi\u1ec5m s\u1eafc th\u1ec3, x\u00e9t 4 gen A, B, C v\u00e0 D. Kho\u1ea3ng c\u00e1ch t\u01b0\u01a1ng \u0111\u1ed1i gi\u1eefa c\u00e1c gen l\u00e0: AB = l,5 cM, BC = 16,5 cM, BD = 3,5 cM, CD = 20 cM, AC = 18 cM. Tr\u1eadt t\u1ef1 \u0111\u00fang c\u1ee7a c\u00e1c gen tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 \u0111\u00f3 l\u00e0<\/p>\n

A.<\/strong>CABD          B.<\/strong>BACD         C.<\/strong>DABC         D.<\/strong>ABCD<\/p>\n

C\u00e2u 15:<\/strong>(ID: 94870)<\/strong>Khi n\u00f3i v\u1ec1 quan h\u1ec7 dinh d\u01b0\u1ee1ng gi\u1eefa c\u00e1c lo\u00e0i trong qu\u1ea7n x\u00e3 sinh v\u1eadt, ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang?<\/p>\n

A.<\/strong>B\u1eadc dinh d\u01b0\u1ee1ng c\u1ea5p 1 bao g\u1ed3m c\u00e1c sinh v\u1eadt \u0103n c\u00e1c sinh v\u1eadt \u0103n c\u00e1c sinh v\u1eadt s\u1ea3n xu\u1ea5t.<\/p>\n

B.<\/strong>Chu\u1ed7i th\u1ee9c \u0103n c\u00e0ng d\u00e0i th\u00ec hi\u1ec7u su\u1ea5t sinh th\u00e1i gi\u1eefa c\u00e1c b\u1eadc dinh d\u01b0\u1ee1ng c\u00e0ng cao.<\/p>\n

C.<\/strong>Trong m\u1ed9t l\u01b0\u1edbi th\u1ee9c \u0103n, c\u00e1c lo\u00e0i sinh v\u1eadt c\u00f3 c\u00f9ng m\u1ee9c dinh d\u01b0\u1ee1ng l\u00e0 nh\u1eefng lo\u00e0i sinh v\u1eadt c\u00f3 c\u00f9ng b\u1eadc thang ti\u1ebfn ho\u00e1.<\/p>\n

D.<\/strong>C\u00e1c lo\u00e0i sinh v\u1eadt c\u00e0ng g\u1ea7n nhau v\u1ec1 ngu\u1ed3n g\u1ed1c, khi s\u1ed1ng trong c\u00f9ng m\u1ed9t sinh c\u1ea3nh v\u00e0 c\u00f9ng s\u1eed d\u1ee5ng m\u1ed9t ngu\u1ed3n th\u1ee9c \u0103n th\u00ec ch\u00fang c\u00f3 xu h\u01b0\u1edbng ph\u00e2n li \u1ed5 sinh th\u00e1i.<\/p>\n

C\u00e2u 16:<\/strong>(ID: 94871)<\/strong>D\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u1ecdn l\u1ecdc t\u1ef1 nhi\u00ean, gen \u0111\u1ed9t bi\u1ebfn g\u00e2y h\u1ea1i n\u00e0o d\u01b0\u1edbi \u0111\u00e2y c\u00f3 th\u1ec3 b\u1ecb lo\u1ea1i b\u1ecf kh\u1ecfi qu\u1ea7n th\u1ec3 nhanh nh\u1ea5t?<\/p>\n

A.<\/strong>Gen l\u1eb7n 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<\/p>\n

B.<\/strong>Gen l\u1eb7n n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 th\u01b0\u1eddng.<\/p>\n

C.<\/strong>Gen tr\u1ed9i n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 th\u01b0\u1eddng.<\/p>\n

D.<\/strong>Gen l\u1eb7n 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<\/p>\n

C\u00e2u 17:<\/strong>(ID: 94872)<\/strong>M\u1ed9t qu\u1ea7n th\u1ec3 th\u1ecf \u0111ang \u1edf tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng di truy\u1ec1n. X\u00e9t m\u1ed9t gen c\u00f3 hai alen l\u00e0 A v\u00e0 a n\u1eb1m tr\u00ean \u0111o\u1ea1n kh\u00f4ng t\u01b0\u01a1ng \u0111\u1ed3ng c\u1ee7a NST X. N\u1ebfu t\u1ea7n s\u1ed1 alen a b\u1eb1ng 0,5 th\u00ec t\u1ec9 l\u1ec7 gi\u1eefa con \u0111\u1ef1c c\u00f3 ki\u1ec3u h\u00ecnh l\u1eb7n v\u1edbi con c\u00e1i c\u0169ng c\u00f3 ki\u1ec3u h\u00ecnh l\u1eb7n l\u00e0<\/p>\n

A.<\/strong>3: 1           B.<\/strong>1: 1           C.<\/strong>2 : 1          D.<\/strong>1,5 : 1<\/p>\n

C\u00e2u 18:<\/strong>(ID: 94873)<\/strong>Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang v\u1ec1 ng\u01b0\u1eddi \u0111\u1ed3ng sinh?<\/p>\n

A.<\/strong>Nh\u1eefng ng\u01b0\u1eddi \u0111\u1ed3ng sinh kh\u00e1c tr\u1ee9ng th\u01b0\u1eddng kh\u00e1c nhau \u1edf nhi\u1ec1u \u0111\u1eb7c \u0111i\u1ec3m h\u01a1n ng\u01b0\u1eddi \u0111\u1ed3ng sinh c\u00f9ng tr\u1ee9ng.<\/p>\n

B.<\/strong>Nh\u1eefng ng\u01b0\u1eddi \u0111\u1ed3ng sinh c\u00f9ng tr\u1ee9ng kh\u00f4ng ho\u00e0n to\u00e0n gi\u1ed1ng nhau v\u1ec1 t\u00e2m l\u00ed, tu\u1ed5i th\u1ecd v\u00e0 s\u1ef1 bi\u1ec3u hi\u1ec7n c\u00e1c n\u0103ng khi\u1ebfu.<\/p>\n

C.<\/strong>Nh\u1eefng ng\u01b0\u1eddi \u0111\u1ed3ng sinh c\u00f9ng tr\u1ee9ng s\u1ed1ng trong ho\u00e0n c\u1ea3nh kh\u00e1c nhau c\u00f3 nh\u1eefng t\u00ednh tr\u1ea1ng kh\u00e1c nhau th\u00ec c\u00e1c t\u00ednh tr\u1ea1ng \u0111\u00f3 ch\u1ecbu \u1ea3nh h\u01b0\u1edfng nhi\u1ec1u c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

D.<\/strong>Nh\u1eefng ng\u01b0\u1eddi \u0111\u1ed3ng sinh c\u00f9ng tr\u1ee9ng s\u1ed1ng trong ho\u00e0n c\u1ea3nh kh\u00e1c nhau c\u00f3 nh\u1eefng t\u00ednh tr\u1ea1ng kh\u00e1c nhau th\u00ec c\u00e1c t\u00ednh tr\u1ea1ng \u0111\u00f3 do ki\u1ec3u gen quy \u0111\u1ecbnh l\u00e0 ch\u1ee7 y\u1ebfu.<\/p>\n

C\u00e2u 19:<\/strong>(ID: 94874)<\/strong>Cho bi\u1ebft c\u00e1c c\u00f4\u0111on tr\u00ean mARN m\u00e3 h\u00f3a c\u00e1c axit amin t\u01b0\u01a1ng \u1ee9ng nh\u01b0 sau: GGG – Gly; XXX – Pro;  <\/p>\n

GXA – Ala; XGA – Arg; UXG – Ser; AGX – Ser. M\u1ed9t \u0111o\u1ea1n m\u1ea1ch g\u1ed1c c\u1ee7a m\u1ed9t gen \u1edf vi khu\u1ea9n c\u00f3 tr\u00ecnh t\u1ef1 c\u00e1c<\/p>\n

nucl\u00ea\u00f4tit l\u00e0 5\u2019TGXXGAXXXGGG3\u2019. N\u1ebfu \u0111o\u1ea1n m\u1ea1ch g\u1ed1c n\u00e0y mang th\u00f4ng tin m\u00e3 h\u00f3a cho \u0111o\u1ea1n p\u00f4lipeptit c\u00f3 4 axit amin th\u00ec tr\u00ecnh t\u1ef1 c\u1ee7a 4 axit amin \u0111\u00f3 l\u00e0<\/p>\n

A.<\/strong>Gly-Pro-Ser-Arg     B.<\/strong>Ser-Ala-Gly-Pro   C.<\/strong>Pro-Gly-Ser-Ala    D.<\/strong>Ser-Arg-Pro-Gly<\/p>\n

C\u00e2u 20:<\/strong>(ID: 94875)<\/strong>Tr\u01b0\u1eddng h\u1ee3p n\u00e0o sau \u0111\u00e2y c\u00f3 th\u1ec3 t\u1ea1o ra h\u1ee3p t\u1eed ph\u00e1t tri\u1ec3n th\u00e0nh ng\u01b0\u1eddi m\u1eafc h\u1ed9i ch\u1ee9ng \u0110ao?<\/p>\n

A.<\/strong>Giao t\u1eed ch\u1ee9a 2 nhi\u1ec5m s\u1eafc th\u1ec3 s\u1ed1 21 k\u1ebft h\u1ee3p v\u1edbi giao t\u1eed b\u00ecnh th\u01b0\u1eddng.<\/p>\n

B.<\/strong>Giao t\u1eed ch\u1ee9a 2 nhi\u1ec5m s\u1eafc th\u1ec3 s\u1ed1 23 k\u1ebft h\u1ee3p v\u1edbi giao t\u1eed b\u00ecnh th\u01b0\u1eddng.<\/p>\n

C.<\/strong>Giao t\u1eed kh\u00f4ng ch\u1ee9a nhi\u1ec5m s\u1eafc th\u1ec3 s\u1ed1 21 k\u1ebft h\u1ee3p v\u1edbi giao t\u1eed b\u00ecnh th\u01b0\u1eddng.<\/p>\n

D.<\/strong>Giao t\u1eed ch\u1ee9a nhi\u1ec5m s\u1eafc th\u1ec3 s\u1ed1 22 b\u1ecb m\u1ea5t \u0111o\u1ea1n k\u1ebft h\u1ee3p v\u1edbi giao t\u1eed b\u00ecnh th\u01b0\u1eddng.<\/p>\n

C\u00e2u 21:<\/strong>(ID: 94876)<\/strong>Khi nghi\u00ean c\u1ee9u nhi\u1ec5m s\u1eafc th\u1ec3 \u1edf ng\u01b0\u1eddi, ta th\u1ea5y nh\u1eefng ng\u01b0\u1eddi c\u00f3 nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1edbi t\u00ednh l\u00e0 XY, XXY ho\u1eb7c XXXY \u0111\u1ec1u l\u00e0 nam, c\u00f2n nh\u1eefng ng\u01b0\u1eddi c\u00f3 nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1edbi t\u00ednh l\u00e0 XX, XO ho\u1eb7c XXX \u0111\u1ec1u l\u00e0 n\u1eef. C\u00f3 th\u1ec3 r\u00fat ra k\u1ebft lu\u1eadn<\/p>\n

A.<\/strong>s\u1ef1 bi\u1ec3u hi\u1ec7n gi\u1edbi t\u00ednh ch\u1ec9 ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ed1 l\u01b0\u1ee3ng nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1edbi t\u00ednh X<\/p>\n

B.<\/strong>gen quy \u0111\u1ecbnh gi\u1edbi t\u00ednh nam n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 Y<\/p>\n

C.<\/strong>nhi\u1ec5m s\u1eafc th\u1ec3 Y kh\u00f4ng mang gen quy \u0111\u1ecbnh t\u00ednh tr\u1ea1ng gi\u1edbi t\u00ednh.<\/p>\n

D.<\/strong>s\u1ef1 c\u00f3 m\u1eb7t c\u1ee7a nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1edbi t\u00ednh X quy\u1ebft \u0111\u1ecbnh gi\u1edbi t\u00ednh n\u1eef.<\/p>\n

C\u00e2u 22:<\/strong>(ID: 94877)<\/strong>Khi n\u00f3i v\u1ec1 \u0111\u1ed9t bi\u1ebfn gen, ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2ykh\u00f4ng<\/strong>\u0111\u00fang?<\/p>\n

A.<\/strong>Ph\u1ea7n l\u1edbn \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec3m l\u00e0 d\u1ea1ng \u0111\u1ed9t bi\u1ebfn m\u1ea5t m\u1ed9t c\u1eb7p nucl\u00ea\u00f4tit.<\/p>\n

B.<\/strong>\u0110\u1ed9t bi\u1ebfn gen l\u00e0 ngu\u1ed3n nguy\u00ean li\u1ec7u s\u01a1 c\u1ea5p ch\u1ee7 y\u1ebfu c\u1ee7a qu\u00e1 tr\u00ecnh ti\u1ebfn ho\u00e1.<\/p>\n

C.<\/strong>Ph\u1ea7n l\u1edbn \u0111\u1ed9t bi\u1ebfn gen x\u1ea3y ra trong qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i ADN<\/p>\n

D.<\/strong>\u0110\u1ed9t bi\u1ebfn gen c\u00f3 th\u1ec3 c\u00f3 l\u1ee3i, c\u00f3 h\u1ea1i ho\u1eb7c trung t\u00ednh \u0111\u1ed1i v\u1edbi th\u1ec3 \u0111\u1ed9t bi\u1ebfn.<\/p>\n

C\u00e2u 23:<\/strong>(ID: 94878)<\/strong>Trong ch\u1ecdn gi\u1ed1ng, ng\u01b0\u1eddi ta ti\u1ebfn h\u00e0nh t\u1ef1 th\u1ee5 ph\u1ea5n b\u1eaft bu\u1ed9c v\u00e0 giao ph\u1ed1i c\u1eadn huy\u1ebft nh\u1eb1m<\/p>\n

A.<\/strong>t\u0103ng t\u1ec9 l\u1ec7 d\u1ecb h\u1ee3p.     B.<\/strong>gi\u1ea3m t\u1ec9 l\u1ec7 \u0111\u1ed3ng h\u1ee3p. C.<\/strong>t\u0103ng bi\u1ebfn d\u1ecb t\u1ed5 h\u1ee3p. D.<\/strong>t\u1ea1o d\u00f2ng thu\u1ea7n.<\/p>\n

C\u00e2u 24:<\/strong>(ID: 94879)<\/strong>M\u1ed9t qu\u1ea7n th\u1ec3 c\u00f3 100% c\u00e1 th\u1ec3 mang ki\u1ec3u gen Aa t\u1ef1 th\u1ee5 ph\u1ea5n li\u00ean ti\u1ebfp qua 3 th\u1ebf h\u1ec7. T\u00ednh theo l\u00ed thuy\u1ebft, t\u1ec9 l\u1ec7 c\u00e1c ki\u1ec3u gen \u1edf th\u1ebf h\u1ec7 th\u1ee9 ba s\u1ebd l\u00e0:<\/p>\n

A.<\/strong>0,2AA : 0,4Aa : 0,4aa                B.<\/strong>0,25AA : 0,5Aa : 0,25aa<\/p>\n

C.<\/strong>0,4375AA : 0,125Aa : 0,4375aa          D.<\/strong>0, 375AA : 0,25Aa : 0,375aa<\/p>\n

C\u00e2u 25:<\/strong>(ID: 94880)<\/strong>C\u00f3 4 d\u00f2ng ru\u1ed3i gi\u1ea5m thu \u0111\u01b0\u1ee3c t\u1eeb 4 v\u00f9ng \u0111\u1ecba l\u00ed kh\u00e1c nhau. Ph\u00e2n t\u00edch tr\u1eadt t\u1ef1 gen tr\u00ean, ng\u01b0\u1eddi ta thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 sau<\/p>\n

D\u00f2ng 1: ABFEDCGHIK             D\u00f2ng 2: ABCDEFGHIK       <\/p>\n

D\u00f2ng 3: ABFEHGIDCK             D\u00f2ng 4: ABFEHGCDIK<\/p>\n

N\u1ebfu d\u00f2ng 2 l\u00e0 d\u00f2ng g\u1ed1c, do m\u1ed9t \u0111\u1ed9t bi\u1ebfn \u0111\u1ea3o \u0111o\u1ea1n NST \u0111\u00e3 l\u00e0m ph\u00e1t sinh ra 3 d\u00f2ng kia theo tr\u1eadt t\u1ef1 l\u00e0:<\/p>\n

A.<\/strong>2 \u2192 1 \u2192 3 \u2192 4     B.<\/strong>2 \u2192 1 \u2192 4 \u2192 3   C.<\/strong>2 \u2192 3 \u2192 4 \u2192 1    D.<\/strong>2 \u2192 3 \u2192 1 \u2192 4<\/p>\n

C\u00e2u 26:<\/strong>(ID: 94881)<\/strong>Cho c\u00e1c th\u00f4ng tin v\u1ec1 qu\u00e1 tr\u00ecnh di\u1ec5n th\u1ebf sinh th\u00e1i nh\u01b0 sau:<\/p>\n

(1) Xu\u1ea5t hi\u1ec7n \u1edf m\u00f4i tr\u01b0\u1eddng tr\u1ed1ng tr\u01a1n, ch\u01b0a t\u1eebng c\u00f3 qu\u1ea7n x\u00e3 sinh v\u1eadt n\u00e0o t\u1ed3n t\u1ea1i.<\/p>\n

(2) C\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i tu\u1ea7n t\u1ef1 c\u1ee7a qu\u1ea7n x\u00e3 qua c\u00e1c giai \u0111o\u1ea1n t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

(3) K\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng l\u00e0 h\u00ecnh th\u00e0nh n\u00ean qu\u1ea7n x\u00e3 \u0111\u1ec9nh c\u1ef1c.<\/p>\n

(4) Nguy\u00ean nh\u00e2n g\u00e2y ra di\u1ec5n th\u1ebf l\u00e0 do t\u00e1c \u0111\u1ed9ng khai th\u00e1c t\u00e0i nguy\u00ean c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n

(5) Qu\u00e1 tr\u00ecnh di\u1ec5n th\u1ebf c\u00f3 th\u1ec3 do t\u00e1c \u0111\u1ed9ng c\u1ee7a nh\u00e2n t\u1ed1 b\u00ean ngo\u00e0i qu\u1ea7n x\u00e3 ho\u1eb7c do s\u1ef1 c\u1ea1nh tranh gay g\u1eaft gi\u1eefa c\u00e1c lo\u00e0i trong qu\u1ea7n x\u00e3.<\/p>\n

T\u1eeb c\u00e1c th\u00f4ng tin tr\u00ean, c\u00f3 bao nhi\u00eau th\u00f4ng tin l\u00e0 \u0111\u1eb7c \u0111i\u1ec3m chung m\u00e0 c\u1ea3 di\u1ec5n th\u1ebf nguy\u00ean sinh v\u00e0 di\u1ec5n th\u1ebf th\u1ee9 sinh \u0111\u1ec1u c\u00f3?<\/p>\n

T\u1ed5 h\u1ee3p \u0111\u00fang l\u00e0:<\/p>\n

A.<\/strong>2.            B.<\/strong>3.            C.<\/strong>5.            D.<\/strong>4.<\/p>\n

C\u00e2u 27:<\/strong>(ID: 94882)<\/strong>Cho c\u00e1c b\u1ec7nh, t\u1eadt v\u00e0 h\u1ed9i ch\u1ee9ng di truy\u1ec1n sau \u0111\u00e2y \u1edf ng\u01b0\u1eddi:<\/p>\n

(1)  B\u1ec7nh ph\u00eanink\u00eato ni\u1ec7u.                   (2)  B\u1ec7nh ung th\u01b0 m\u00e1u.<\/p>\n

(3)  T\u1eadt c\u00f3 t\u00fam l\u00f4ng \u1edf v\u00e0nh tai.                (4)  H\u1ed9i ch\u1ee9ng \u0110ao.<\/p>\n

(5)  H\u1ed9i ch\u1ee9ng T\u01a1cn\u01a1.                      (6)  B\u1ec7nh m\u00e1u kh\u00f3 \u0111\u00f4ng.<\/p>\n

B\u1ec7nh, t\u1eadt v\u00e0 h\u1ed9i ch\u1ee9ng di truy\u1ec1n c\u00f3 th\u1ec3 g\u1eb7p \u1edf c\u1ea3 nam v\u00e0 n\u1eef l\u00e0:<\/p>\n

A.<\/strong>(2), (3), (4), (6).      B.<\/strong>(3), (4), (5), (6).    C.<\/strong>(1), (2), (5).      D.<\/strong>(1), (2), (4), (6).<\/p>\n

C\u00e2u 28:<\/strong>(ID: 94883)<\/strong>Trong tr\u01b0\u1eddng h\u1ee3p gi\u1ea3m ph\u00e2n v\u00e0 th\u1ee5 tinh b\u00ecnh th\u01b0\u1eddng, m\u1ed9t gen quy \u0111\u1ecbnh m\u1ed9t t\u00ednh tr\u1ea1ng v\u00e0 gen tr\u1ed9i l\u00e0 tr\u1ed9i ho\u00e0n to\u00e0n. T\u00ednh theo l\u00ed thuy\u1ebft, ph\u00e9p lai AaBbDdHh \u00d7 AaBbDdHh s\u1ebd cho ki\u1ec3u h\u00ecnh mang 3 t\u00ednh tr\u1ea1ng tr\u1ed9i v\u00e0 1 t\u00ednh tr\u1ea1ng l\u1eb7n \u1edf \u0111\u1eddi con chi\u1ebfm t\u1ec9 l\u1ec7<\/p>\n

A.<\/strong>81\/256.         B.<\/strong>27\/64.         C.<\/strong>27\/256.         D.<\/strong>9\/64.<\/p>\n

C\u00e2u 29:<\/strong>(ID: 94884)<\/strong>C\u00f3 3 t\u1ebf b\u00e0o sinh tinh c\u1ee7a m\u1ed9t c\u00e1 th\u1ec3 c\u00f3 ki\u1ec3u gen AaBbddEe ti\u1ebfn h\u00e0nh gi\u1ea3m ph\u00e2n b\u00ecnh th\u01b0\u1eddng h\u00ecnh th\u00e0nh tinh tr\u00f9ng. S\u1ed1 lo\u1ea1i tinh tr\u00f9ng t\u1ed1i \u0111a c\u00f3 th\u1ec3 t\u1ea1o ra l\u00e0<\/p>\n

A.<\/strong>6.            B.<\/strong>8.            C.<\/strong>2.            D.<\/strong>4.<\/p>\n

C\u00e2u 30:<\/strong>(ID: 94885)<\/strong>Khi n\u00f3i v\u1ec1 thuy\u1ebft ti\u1ebfn ho\u00e1 trung t\u00ednh c\u1ee7a Kimura, ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2ykh\u00f4ng<\/strong>\u0111\u00fang?<\/p>\n

A.<\/strong>Nguy\u00ean nh\u00e2n ch\u1ee7 y\u1ebfu c\u1ee7a s\u1ef1 ti\u1ebfn h\u00f3a \u1edf c\u1ea5p ph\u00e2n t\u1eed l\u00e0 s\u1ef1 c\u1ee7ng c\u1ed1 ng\u1eabu nhi\u00ean c\u00e1c \u0111\u1ed9t bi\u1ebfn trung t\u00ednh<\/p>\n

B.<\/strong>Thuy\u1ebft ti\u1ebfn h\u00f3a trung t\u00ednh d\u1ef1a tr\u00ean c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 nh\u1eefng bi\u1ebfn \u0111\u1ed5i trong c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c ph\u00e2n t\u1eed pr\u00f4t\u00eain<\/p>\n

C.<\/strong>Thuy\u1ebft ti\u1ebfn ho\u00e1 trung t\u00ednh cho r\u1eb1ng m\u1ecdi \u0111\u1ed9t bi\u1ebfn \u0111\u1ec1u trung t\u00ednh.<\/p>\n

D.<\/strong>Thuy\u1ebft ti\u1ebfn ho\u00e1 trung t\u00ednh nghi\u00ean c\u1ee9u s\u1ef1 ti\u1ebfn ho\u00e1 \u1edf c\u1ea5p \u0111\u1ed9 ph\u00e2n t\u1eed.<\/p>\n

C\u00e2u 31:<\/strong>(ID: 94886)<\/strong>Quan h\u1ec7 h\u1ed7 tr\u1ee3 gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 c\u00f3 \u00fd ngh\u0129a: <\/p>\n

(1) \u0110\u1ea3m b\u1ea3o cho qu\u1ea7n th\u1ec3 th\u00edch nghi t\u1ed1t h\u01a1n v\u1edbi \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng, t\u1ed3n t\u1ea1i \u1ed5n \u0111\u1ecbnh v\u1edbi th\u1eddi gian, ch\u1ed1ng l\u1ea1i c\u00e1c t\u00e1c nh\u00e2n b\u1ea5t l\u1ee3i t\u1eeb m\u00f4i tr\u01b0\u1eddng.<\/p>\n

(2) Gi\u00fap qu\u1ea7n th\u1ec3 sinh v\u1eadt duy tr\u00ec m\u1eadt \u0111\u1ed9 c\u00e1 th\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi s\u1ee9c ch\u1ee9a c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

(3) T\u1ea1o hi\u1ec7u qu\u1ea3 nh\u00f3m, khai th\u00e1c t\u1ed1i \u01b0u ngu\u1ed3n s\u1ed1ng.<\/p>\n

(4) Lo\u1ea1i b\u1ecf c\u00e1c c\u00e1 th\u1ec3 y\u1ebfu, gi\u1eef l\u1ea1i c\u00e1c c\u00e1 th\u1ec3 c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m th\u00edch nghi v\u1edbi m\u00f4i tr\u01b0\u1eddng, \u0111\u1ea3m b\u1ea3o v\u00e0 th\u00fac \u0111\u1ea9y qu\u1ea7n th\u1ec3 ph\u00e1t tri\u1ec3n.<\/p>\n

(5) T\u0103ng 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

T\u1ed5 h\u1ee3p \u0111\u00fang l\u00e0:<\/p>\n

A.<\/strong>(1); (2); (4); (5).      B.<\/strong>(1); (2); (3); (4); (5). C.<\/strong>(1); (2); (5).      D.<\/strong>(1); (3); (5).<\/p>\n

C\u00e2u 32:<\/strong>(ID: 94887)<\/strong>\u1ede ng\u01b0\u1eddi, gen l\u1eb7n g\u00e2y b\u1ec7nh b\u1ea1ch t\u1ea1ng n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 th\u01b0\u1eddng, alen tr\u1ed9i t\u01b0\u01a1ng \u1ee9ng quy \u0111\u1ecbnh da b\u00ecnh th\u01b0\u1eddng. Gi\u1ea3 s\u1eed trong qu\u1ea7n th\u1ec3 ng\u01b0\u1eddi, c\u1ee9 trong 100 ng\u01b0\u1eddi da b\u00ecnh th\u01b0\u1eddng th\u00ec c\u00f3 m\u1ed9t ng\u01b0\u1eddi mang gen b\u1ea1ch t\u1ea1ng. M\u1ed9t c\u1eb7p v\u1ee3 ch\u1ed3ng c\u00f3 da b\u00ecnh th\u01b0\u1eddng, x\u00e1c su\u1ea5t sinh con b\u1ecb b\u1ea1ch t\u1ea1ng c\u1ee7a h\u1ecd l\u00e0<\/p>\n

A.<\/strong>0,0025%.        B.<\/strong>0,025%.        C.<\/strong>0,0125%.       D.<\/strong>0,25%.<\/p>\n

C\u00e2u 33:<\/strong>(ID: 94888)<\/strong>M\u1ed9t mARN s\u01a1 khai phi\u00ean m\u00e3 t\u1eeb m\u1ed9t gen c\u1ea5u tr\u00fac \u1edf sinh v\u1eadt nh\u00e2n chu\u1ea9n c\u00f3 c\u00e1c v\u00f9ng v\u00e0 s\u1ed1 nucl\u00ea\u00f4tit t\u01b0\u01a1ng \u1ee9ng nh\u01b0 sau<\/p>\n\n\n\n

\n Exon 1<\/p>\n<\/td>\n

\n Intron 1<\/p>\n<\/td>\n

\n Exon 2<\/p>\n<\/td>\n

\n Intron 2<\/p>\n<\/td>\n

\n Exon 3<\/p>\n<\/td>\n

\n Intron 3<\/p>\n<\/td>\n

\n Exon 4<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n          60       55       60        66       60      78        60<\/p>\n S\u1ed1 axit amin trong 1 ph\u00e2n t\u1eed pr\u00f4t\u00eain ho\u00e0n ch\u1ec9nh do mARN tr\u00ean t\u1ed5ng h\u1ee3p l\u00e0<\/p>\n A.<\/strong>80.            B.<\/strong>79.          C.<\/strong>78.          D.<\/strong>64.<\/p>\n C\u00e2u 34:<\/strong>(ID: 94889)<\/strong>M\u00f4\u0323t qu\u00e2\u0300n th\u00ea\u0309 ng\u01b0\u01a1\u0300i co\u0301 h\u00ea\u0323 nho\u0301m ma\u0301u  A, B, AB, O c\u00e2n b\u0103\u0300ng di truy\u00ea\u0300n.T\u1ea7n s\u1ed1 alen I<\/p>\n A<\/dd>\n = 0,1; I<\/p>\n B<\/dd>\n = 0,7; I<\/p>\n o<\/dd>\n  = 0,2.T\u1ea7n s\u1ed1 c\u00e1c nh\u00f3m m\u00e1u A, B, AB, O l\u1ea7n l\u01b0\u1ee3t l\u00e0<\/p>\n A.<\/strong>0,05;   0,81;  0,10; 0,04.              B.<\/strong>0,05  ; 0,7;   0,21;   0,04.<\/p>\n C.<\/strong>0,3; 0,4;  0,26 ; 0,04.                 D.<\/strong>0,05 ; 0,77; 0,14;  0,04.<\/p>\n C\u00e2u 35:<\/strong>(ID: 94890)<\/strong>\u1ede ng\u01b0\u1eddi, t\u00ednh tr\u1ea1ng nh\u00f3m m\u00e1u ABO do m\u1ed9t gen c\u00f3 3 alen I<\/p>\n A<\/dd>\n , I<\/p>\n B<\/dd>\n , I<\/p>\n O<\/dd>\n qui \u0111\u1ecbnh. Trong m\u1ed9t qu\u1ea7n th\u1ec3 c\u00e2n b\u1eb1ng di truy\u1ec1n c\u00f3 4% s\u1ed1 ng\u01b0\u1eddi mang nh\u00f3m m\u00e1u O; 21% s\u1ed1 ng\u01b0\u1eddi mang nh\u00f3m m\u00e1uB.<\/strong>M\u1ed9t c\u1eb7p v\u1ee3 ch\u1ed3ng \u0111\u1ec1u c\u00f3 nh\u00f3m m\u00e1u A d\u1ecb h\u1ee3p sinh m\u1ed9t ng\u01b0\u1eddi con, x\u00e1c su\u1ea5t \u0111\u1ec3 ng\u01b0\u1eddi con n\u00e0y mang nh\u00f3m m\u00e1u gi\u1ed1ng b\u1ed1 m\u1eb9 l\u00e0 bao nhi\u00eau?<\/p>\n A.<\/strong>4%.           B.<\/strong>75%.         C.<\/strong>3%.          D.<\/strong>15%.<\/p>\n C\u00e2u 36:<\/strong>(ID: 94891)<\/strong>\u1ede \u0111\u1eadu H\u00e0 Lan, gen 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. Cho c\u00e2y th\u00e2n cao giao ph\u1ea5n v\u1edbi c\u00e2y th\u00e2n cao, thu \u0111\u01b0\u1ee3c F<\/p>\n 1<\/dd>\n g\u1ed3m 900 c\u00e2y th\u00e2n cao v\u00e0 299 c\u00e2y th\u00e2n th\u1ea5p. T\u00ednh theo l\u00ed thuy\u1ebft, t\u1ec9 l\u1ec7 c\u00e2y F<\/p>\n 1<\/dd>\n t\u1ef1 th\u1ee5  ph\u1ea5n cho F<\/p>\n 2<\/dd>\n g\u1ed3m to\u00e0n c\u00e2y th\u00e2n cao so v\u1edbi t\u1ed5ng s\u1ed1 c\u00e2y \u1edf F<\/p>\n 1<\/dd>\n l\u00e0<\/p>\n A.<\/strong>1\/4.           B.<\/strong>2\/3.           C.<\/strong>3\/4.           D.<\/strong>1\/2.<\/p>\n C\u00e2u 37:<\/strong>(ID: 94892)<\/strong>M\u1ed9t ph\u00e2n t\u1eed mARN c\u00f3 th\u00e0nh  ph\u1ea7n c\u1ea5u t\u1ea1o  g\u1ed3m  2 lo\u1ea1i ribonucleotit A, G \u0111ang tham gia d\u1ecbch m\u00e3. Theo l\u00fd thuy\u1ebft, trong m\u00f4i tr\u01b0\u1eddng n\u1ed9i b\u00e0o c\u00f3 t\u1ed1i \u0111a bao nhi\u00eau lo\u1ea1i tARN tr\u1ef1c ti\u1ebfp tham gia v\u00e0o qu\u00e1 tr\u00ecnh d\u1ecbch m\u00e3 d\u1ef1a tr\u00ean th\u00f4ng tin di truy\u1ec1n c\u1ee7a ph\u00e2n t\u1eed mARN tr\u00ean ?<\/p>\n A.<\/strong>6 lo\u1ea1i.          B.<\/strong>20 lo\u1ea1i.         C.<\/strong>4 lo\u1ea1i.         D.<\/strong>8 lo\u1ea1i.<\/p>\n C\u00e2u 38:<\/strong>(ID: 94893)<\/strong>Ph\u00e2n t\u1eed ADN \u1edf v\u00f9ng nh\u00e2n c\u1ee7a vi khu\u1ea9n E. coli ch\u1ec9 ch\u1ee9a N<\/p>\n 14<\/dd>\n ph\u00f3ng x\u1ea1. N\u1ebfu chuy\u1ec3n nh\u1eefng vi khu\u1ea9n E. coli n\u00e0y sang m\u00f4i tr\u01b0\u1eddng ch\u1ec9 c\u00f3 N<\/p>\n 15<\/dd>\n th\u00ec m\u1ed7i t\u1ebf b\u00e0o vi khu\u1ea9n E. coli n\u00e0y sau 7 l\u1ea7n nh\u00e2n \u0111\u00f4i s\u1ebd t\u1ea1o ra bao nhi\u00eau ph\u00e2n t\u1eed ADN \u1edf v\u00f9ng nh\u00e2n ho\u00e0n to\u00e0n ch\u1ee9a N<\/p>\n 15<\/dd>\n ?<\/p>\n A.<\/strong>126.            B.<\/strong>132.          C.<\/strong>130.          D.<\/strong>128.<\/p>\n C\u00e2u 39:<\/strong>(ID: 94894)<\/strong>D\u00f9ng c\u00f4nsixin \u0111\u1ec3 x\u1eed l\u00ed c\u00e1c h\u1ee3p t\u1eed l\u01b0\u1ee1ng b\u1ed9i c\u00f3 ki\u1ec3u gen Aa thu \u0111\u01b0\u1ee3c c\u00e1c th\u1ec3 t\u1ee9 b\u1ed9i. Cho c\u00e1c th\u1ec3 t\u1ee9 b\u1ed9i tr\u00ean giao ph\u1ea5n v\u1edbi nhau, trong tr\u01b0\u1eddng h\u1ee3p c\u00e1c c\u00e2y b\u1ed1 m\u1eb9 gi\u1ea3m ph\u00e2n b\u00ecnh th\u01b0\u1eddng, t\u00ednh theo l\u00ed thuy\u1ebft t\u1ec9 l\u1ec7 ph\u00e2n li ki\u1ec3u gen \u1edf \u0111\u1eddi con l\u00e0:<\/p>\n A.<\/strong>1AAAA : 8AAAa : 18Aaaa : 8AAaa : 1aaaa    B.<\/strong>1AAAA : 8AAAa : 18AAaa : 8Aaaa : 1aaaa<\/p>\n C.<\/strong>1AAAA : 4AAAa : 6AAaa : 4Aaaa : 1aaaa    D.<\/strong>1AAAA : 8AAaa : 18AAAa : 8Aaaa : 1aaaa<\/p>\n C\u00e2u 40:<\/strong>(ID: 94895)<\/strong>M\u1ed9t qu\u1ea7n th\u1ec3 sinh v\u1eadt c\u00f3 gen A b\u1ecb \u0111\u1ed9t bi\u1ebfn th\u00e0nh gen a, gen B b\u1ecb \u0111\u1ed9t bi\u1ebfn th\u00e0nh gen b. Bi\u1ebft c\u00e1c c\u1eb7p gen t\u00e1c \u0111\u1ed9ng ri\u00eang r\u1ebd v\u00e0 gen tr\u1ed9i l\u00e0 tr\u1ed9i ho\u00e0n to\u00e0n. C\u00e1c ki\u1ec3u gen n\u00e0o sau \u0111\u00e2y l\u00e0 c\u1ee7a th\u1ec3 \u0111\u1ed9t bi\u1ebfn?<\/p>\n A.<\/strong>AaBb, AABb       B.<\/strong>aaBb, Aabb      C.<\/strong>AABb, AaBB    D.<\/strong>AABB, AABb<\/p>\n C\u00e2u 41:<\/strong>(ID: 94896)<\/strong>Gen A quy \u0111\u1ecbnh c\u00e2y qu\u1ea3 \u0111\u1ecf; a quy \u0111\u1ecbnh c\u00e2y qu\u1ea3 v\u00e0ng. Th\u1ebf h\u1ec7 ban \u0111\u1ea7u c\u1ee7a m\u1ed9t qu\u1ea7n th\u1ec3 giao ph\u1ed1i c\u00f3 t\u1ec9 l\u1ec7 ki\u1ec3u gen 1 Aa :  2aa. T\u1ec9 l\u1ec7 ki\u1ec3u h\u00ecnh \u1edf th\u1ebf h\u1ec7 ng\u1eabu ph\u1ed1i F<\/p>\n 20<\/dd>\n l\u00e0<\/p>\n A.<\/strong>4 \u0111\u1ecf : 5 v\u00e0ng       B.<\/strong>5 \u0111\u1ecf : 4 v\u00e0ng      C.<\/strong>2<\/strong>5 \u0111\u1ecf : 11 v\u00e0ng    D.<\/strong>11 \u0111\u1ecf : 25 v\u00e0ng<\/p>\n C\u00e2u 42:<\/strong>(ID: 94897)<\/strong>Ph\u00e1t bi\u1ec3u \u0111\u00fang khi n\u00f3i v\u1ec1 m\u1ee9c ph\u1ea3n \u1ee9ng l\u00e0:<\/p>\n A.<\/strong>M\u1ee9c ph\u1ea3n \u1ee9ng kh\u00f4ng do ki\u1ec3u gen quy \u0111\u1ecbnh.<\/p>\n B.<\/strong>C\u00e1c gen trong m\u1ed9t ki\u1ec3u gen ch\u1eafc ch\u1eafn s\u1ebd c\u00f3 m\u1ee9c ph\u1ea3n \u1ee9ng nh\u01b0 nhau.<\/p>\n C.<\/strong>M\u1ed7i gen trong m\u1ed9t ki\u1ec3u gen c\u00f3 m\u1ee9c ph\u1ea3n \u1ee9ng ri\u00eang.<\/p>\n D.<\/strong>T\u00ednh tr\u1ea1ng s\u1ed1 l\u01b0\u1ee3ng c\u00f3 m\u1ee9c ph\u1ea3n \u1ee9ng h\u1eb9p, t\u00ednh tr\u1ea1ng ch\u1ea5t l\u01b0\u1ee3ng c\u00f3 m\u1ee9c ph\u1ea3n \u1ee9ng r\u1ed9ng.<\/p>\n C\u00e2u 43:<\/strong>(ID: 94898)<\/strong>Cho m\u1ed9t c\u00e2y c\u00e0 chua t\u1ee9 b\u1ed9i c\u00f3 ki\u1ec3u gen AAaa lai v\u1edbi m\u1ed9t c\u00e2y l\u01b0\u1ee1ng b\u1ed9i c\u00f3 ki\u1ec3u gen Aa. Qu\u00e1 tr\u00ecnh gi\u1ea3m ph\u00e2n \u1edf c\u00e1c c\u00e2y b\u1ed1 m\u1eb9 x\u1ea3y ra b\u00ecnh th\u01b0\u1eddng, c\u00e1c lo\u1ea1i giao t\u1eed \u0111\u01b0\u1ee3c t\u1ea1o ra \u0111\u1ec1u c\u00f3 kh\u1ea3 n\u0103ng th\u1ee5 tinh. T\u1ec9 l\u1ec7 ki\u1ec3u gen \u0111\u1ed3ng h\u1ee3p t\u1eed l\u1eb7n \u1edf \u0111\u1eddi con l\u00e0<\/p>\n A.<\/strong>1\/2.           B.<\/strong>1\/36.         C.<\/strong>1\/6.           D.<\/strong>1\/12.<\/p>\n C\u00e2u 44:<\/strong>(ID: 94899)<\/strong>\u1ede ng\u01b0\u1eddi, alen A quy \u0111\u1ecbnh m\u0169i cong l\u00e0 tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen a quy \u0111\u1ecbnh m\u0169i th\u1eb3ng; alen B quy \u0111\u1ecbnh m\u1eaft \u0111en l\u00e0 tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen b quy \u0111\u1ecbnh m\u1eaft xanh. C\u00e1c locus n\u00e0y n\u1eb1m tr\u00ean c\u00e1c c\u1eb7p nhi\u1ec5m s\u1eafc th\u1ec3 th\u01b0\u1eddng kh\u00e1c nhau. \u0110\u1ec3 sinh ra con c\u00f3 c\u1ea3 4 l\u1edbp ki\u1ec3u h\u00ecnh: M\u0169i cong, m\u1eaft \u0111en; m\u0169i cong, m\u1eaft xanh;  m\u0169i th\u1eb3ng, m\u1eaft \u0111en;  m\u0169i th\u1eb3ng, m\u1eaft xanh th\u00ec c\u00f3 t\u1ed1i \u0111a bao nhi\u00eau ki\u1ec3u gen c\u1ee7a ng\u01b0\u1eddi b\u1ed1 c\u00f3 th\u1ec3 sinh ra c\u00e1c con nh\u01b0 tr\u00ean?<\/p>\n A.<\/strong>4.            B.<\/strong>2.            C.<\/strong>3.            D.<\/strong>1.<\/p>\n C\u00e2u 45:<\/strong>(ID: 94900)<\/strong>Khi n\u00f3i v\u1ec1 ngu\u1ed3n nguy\u00ean li\u1ec7u c\u1ee7a ti\u1ebfn ho\u00e1, ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2ykh\u00f4ng<\/strong>\u0111\u00fang?<\/p>\n A.<\/strong>M\u1ecdi bi\u1ebfn d\u1ecb trong qu\u1ea7n th\u1ec3 \u0111\u1ec1u l\u00e0 nguy\u00ean li\u1ec7u c\u1ee7a qu\u00e1 tr\u00ecnh ti\u1ebfn ho\u00e1.<\/p>\n B.<\/strong>Ti\u1ebfn ho\u00e1 s\u1ebd kh\u00f4ng x\u1ea3y ra n\u1ebfu qu\u1ea7n th\u1ec3 kh\u00f4ng c\u00f3 c\u00e1c bi\u1ebfn d\u1ecb di truy\u1ec1n.<\/p>\n C.<\/strong>\u0110\u1ed9t bi\u1ebfn gen l\u00e0 nguy\u00ean li\u1ec7u s\u01a1 c\u1ea5p ch\u1ee7 y\u1ebfu c\u1ee7a qu\u00e1 tr\u00ecnh ti\u1ebfn ho\u00e1.<\/p>\n D.<\/strong>Ngu\u1ed3n bi\u1ebfn d\u1ecb c\u1ee7a qu\u1ea7n th\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c b\u1ed5 sung b\u1edfi s\u1ef1 nh\u1eadp c\u01b0.<\/p>\n C\u00e2u 46:<\/strong>(ID: 94901)<\/strong>Nh\u1eefng lo\u00e0i c\u00f3 gi\u1edbi h\u1ea1n sinh th\u00e1i v\u1ec1 nhi\u1ec7t \u0111\u1ed9 h\u1eb9p th\u01b0\u1eddngkh\u00f4ng<\/strong>s\u1ed1ng \u1edf:<\/p>\n A.<\/strong>V\u00f9ng \u00f4n \u0111\u1edbi.                    B.<\/strong>C\u00e1c v\u00f9ng c\u1ef1c.<\/p>\n C.<\/strong>V\u00f9ng nhi\u1ec7t \u0111\u1edbi.                  D.<\/strong>Tr\u00ean c\u00e1c \u0111\u1ec9nh n\u00fai cao.<\/p>\n C\u00e2u 47:<\/strong>(ID: 94902)<\/strong>M\u1ed9t ph\u00e2n t\u1eed mARN d\u00e0i 2040\u00c5 \u0111\u01b0\u1ee3c t\u00e1ch ra t\u1eeb vi khu\u1ea9n E. coli c\u00f3 t\u1ec9 l\u1ec7 c\u00e1c lo\u1ea1i nucl\u00ea\u00f4tit A, G, U v\u00e0 X l\u1ea7n l\u01b0\u1ee3t l\u00e0 20%, 15%, 40% v\u00e0 25%. Ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng ph\u00e2n t\u1eed mARN n\u00e0y l\u00e0m khu\u00f4n \u0111\u1ec3 t\u1ed5ng h\u1ee3p nh\u00e2n t\u1ea1o m\u1ed9t \u0111o\u1ea1n ADN c\u00f3 chi\u1ec1u d\u00e0i b\u1eb1ng chi\u1ec1u d\u00e0i ph\u00e2n t\u1eed mARN. T\u00ednh theo l\u00ed thuy\u1ebft, s\u1ed1 l\u01b0\u1ee3ng nucl\u00ea\u00f4tit m\u1ed7i lo\u1ea1i c\u1ea7n ph\u1ea3i cung c\u1ea5p cho qu\u00e1 tr\u00ecnh t\u1ed5ng h\u1ee3p m\u1ed9t \u0111o\u1ea1n ADN tr\u00ean l\u00e0:<\/p>\n A.<\/strong>G = X = 360, A = T = 240.            B.<\/strong>G = X = 240, A = T = 360.<\/p>\n C.<\/strong>G = X = 280, A = T = 320.            D.<\/strong>G = X = 320, A = T = 280.<\/p>\n C\u00e2u 48:<\/strong>(ID: 94903)<\/strong>\u0110\u1ec3 t\u1ea1o ra m\u1ed9t gi\u1ed1ng c\u00e2y thu\u1ea7n ch\u1ee7ng c\u00f3 ki\u1ec3u gen aaBBDD t\u1eeb hai gi\u1ed1ng c\u00e2y ban \u0111\u1ea7u c\u00f3 ki\u1ec3u gen AABBdd v\u00e0 aabbDD, ng\u01b0\u1eddi ta ti\u1ebfn h\u00e0nh:<\/p>\n A.<\/strong>Lai hai gi\u1ed1ng ban \u0111\u1ea7u v\u1edbi nhau t\u1ea1o F<\/p>\n 1<\/dd>\n ; cho F<\/p>\n 1<\/dd>\n t\u1ef1 th\u1ee5 ph\u1ea5n t\u1ea1o F<\/p>\n 2<\/dd>\n ; ch\u1ecdn c\u00e1c c\u00e2y F<\/p>\n 2<\/dd>\n c\u00f3 ki\u1ec3u h\u00ecnh (aaB-D-) r\u1ed3i cho t\u1ef1 th\u1ee5 ph\u1ea5n qua m\u1ed9t s\u1ed1 th\u1ebf h\u1ec7 \u0111\u1ec3 t\u1ea1o ra gi\u1ed1ng c\u00e2y c\u00f3 ki\u1ec3u gen aaBBDD<\/p>\n B.<\/strong>Lai hai gi\u1ed1ng ban \u0111\u1ea7u v\u1edbi nhau t\u1ea1o F<\/p>\n 1<\/dd>\n ; cho F<\/p>\n 1<\/dd>\n t\u1ef1 th\u1ee5 ph\u1ea5n t\u1ea1o F<\/p>\n 2<\/dd>\n ; ch\u1ecdn c\u00e1c c\u00e2y F<\/p>\n 2<\/dd>\n c\u00f3 ki\u1ec3u h\u00ecnh (aaB-D-) r\u1ed3i d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p t\u1ebf b\u00e0o h\u1ecdc \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e2y c\u00f3 ki\u1ec3u gen aaBBDD<\/p>\n C.<\/strong>Lai hai gi\u1ed1ng ban \u0111\u1ea7u v\u1edbi nhau t\u1ea1o F<\/p>\n 1<\/dd>\n r\u1ed3i ch\u1ecdn l\u1ecdc c\u00e1c c\u00e2y c\u00f3 ki\u1ec3u h\u00ecnh (aaB-D-) cho t\u1ef1 th\u1ee5 ph\u1ea5n qua m\u1ed9t s\u1ed1 th\u1ebf h\u1ec7 \u0111\u1ec3 t\u1ea1o ra gi\u1ed1ng c\u00e2y c\u00f3 ki\u1ec3u gen aaBBDD<\/p>\n D.<\/strong>Lai hai gi\u1ed1ng ban \u0111\u1ea7u v\u1edbi nhau t\u1ea1o F<\/p>\n 1<\/dd>\n ; cho F<\/p>\n 1<\/dd>\n lai tr\u1edf l\u1ea1i v\u1edbi c\u00e2y c\u00f3 ki\u1ec3u gen AABBdd t\u1ea1o F<\/p>\n 2<\/dd>\n . C\u00e1c c\u00e2y c\u00f3 ki\u1ec3u h\u00ecnh (aaB-D-) thu \u0111\u01b0\u1ee3c \u1edf F<\/p>\n 2<\/dd>\n ch\u00ednh l\u00e0 gi\u1ed1ng c\u00e2y c\u00f3 ki\u1ec3u gen aaBBDD<\/p>\n C\u00e2u 49:<\/strong>(ID: 94904)<\/strong>Khi n\u00f3i v\u1ec1 quan h\u1ec7 c\u1ea1nh tranh, ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2ykh\u00f4ng<\/strong>\u0111\u00fang?<\/p>\n A.<\/strong>Quan h\u1ec7 c\u1ea1nh tranh l\u00e0 \u0111\u1eb7c \u0111i\u1ec3m th\u00edch nghi c\u1ee7a lo\u00e0i, gi\u00fap qu\u1ea7n th\u1ec3 sinh v\u1eadt duy tr\u00ec m\u1eadt \u0111\u1ed9 c\u00e1 th\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi s\u1ee9c ch\u1ee9a c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n B.<\/strong>Khi m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 c\u1ea1nh tranh nhau qu\u00e1 gay g\u1eaft th\u00ec c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 tr\u1edf n\u00ean \u0111\u1ed1i kh\u00e1ng nhau.<\/p>\n C.<\/strong>Trong m\u1ed1i quan h\u1ec7 c\u1ea1nh tranh gi\u1eefa hai lo\u00e0i, lo\u00e0i th\u1eafng th\u1ebf s\u1ebd c\u00f3 l\u1ee3i c\u00f2n lo\u00e0i b\u1ecb thua s\u1ebd b\u1ea5t l\u1ee3i.<\/p>\n D.<\/strong>Quan h\u1ec7 c\u1ea1nh tranh c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 thu\u1ed9c c\u00f9ng m\u1ed9t lo\u00e0i ho\u1eb7c gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt kh\u00e1c nhau.<\/p>\n C\u00e2u 50:<\/strong>(ID: 94905)<\/strong>Cho c\u00e1c ph\u01b0\u01a1ng ph\u00e1p sau:<\/p>\n (1)  T\u1ef1 th\u1ee5 ph\u1ea5n b\u1eaft bu\u1ed9c qua nhi\u1ec1u th\u1ebf h\u1ec7.<\/p>\n (2)  Dung h\u1ee3p t\u1ebf b\u00e0o tr\u1ea7n kh\u00e1c lo\u00e0i.<\/p>\n (3)  Lai gi\u1eefa c\u00e1c d\u00f2ng thu\u1ea7n ch\u1ee7ng c\u00f3 ki\u1ec3u gen kh\u00e1c nhau \u0111\u1ec3 t\u1ea1o ra F<\/p>\n 1<\/dd>\n .<\/p>\n (4)  Nu\u00f4i c\u1ea5y h\u1ea1t ph\u1ea5n r\u1ed3i ti\u1ebfn h\u00e0nh l\u01b0\u1ee1ng b\u1ed9i ho\u00e1 c\u00e1c d\u00f2ng \u0111\u01a1n b\u1ed9i.<\/p>\n C\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra d\u00f2ng thu\u1ea7n ch\u1ee7ng \u1edf th\u1ef1c v\u1eadt l\u00e0:<\/p>\n A.<\/strong>(1), (2).         B.<\/strong>(1), (4).         C.<\/strong>(1), (3).         D.<\/strong>(2), (3).<\/p>\n C\u00e2u 51:<\/strong>(ID: 94906)<\/strong>C\u00f3 hai lo\u00e0i c\u00e1: lo\u00e0i c\u00e1 c\u01a1m ph\u00e2n b\u1ed1 ph\u1ed5 bi\u1ebfn \u1edf v\u00f9ng bi\u1ec3n \u00f4n \u0111\u1edbi Ch\u00e2u \u00c2u v\u00e0 lo\u00e0i c\u00e1 mi\u1ec7ng \u0111\u1ee5c s\u1ed1ng trong c\u00e1c r\u1ea1n san h\u00f4 v\u00f9ng bi\u1ec3n nhi\u1ec7t \u0111\u1edbi. Lo\u00e0i c\u00e1 n\u00e0o r\u1ed9ng nhi\u1ec7t h\u01a1n? V\u00ec sao<\/p>\n A.<\/strong>Lo\u00e0i c\u00e1 c\u01a1m r\u1ed9ng nhi\u1ec7t h\u01a1n lo\u00e0i c\u00e1 mi\u1ec7ng \u0111\u1ee5c v\u00ec \u1edf v\u00f9ng \u00f4n \u0111\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc giao \u0111\u1ed9ng m\u1ea1nh h\u01a1n, c\u00f2n \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi c\u00f3 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc kh\u00f4ng giao \u0111\u1ed9ng.      <\/p>\n B.<\/strong>Lo\u00e0i c\u00e1 mi\u1ec7ng \u0111\u1ee5c r\u1ed9ng nhi\u1ec7t h\u01a1n lo\u00e0i c\u00e1 c\u01a1m v\u00ec \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc giao \u0111\u1ed9ng m\u1ea1nh h\u01a1n, c\u00f2n \u1edf v\u00f9ng \u00f4n \u0111\u1edbi \u0111\u1edbi c\u00f3 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc kh\u00e1 \u1ed5n \u0111\u1ecbnh.<\/p>\n C.<\/strong>Lo\u00e0i c\u00e1 c\u01a1m r\u1ed9ng nhi\u1ec7t h\u01a1n lo\u00e0i c\u00e1 mi\u1ec7ng \u0111\u1ee5c v\u00ec \u1edf v\u00f9ng \u00f4n \u0111\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc giao \u0111\u1ed9ng m\u1ea1nh h\u01a1n, c\u00f2n \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi c\u00f3 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc kh\u00e1 \u1ed5n \u0111\u1ecbnh.        <\/p>\n D.<\/strong>Lo\u00e0i c\u00e1 mi\u1ec7ng \u0111\u1ee5c r\u1ed9ng nhi\u1ec7t h\u01a1n lo\u00e0i c\u00e1 c\u01a1m v\u00ec \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc giao \u0111\u1ed9ng m\u1ea1nh h\u01a1n, c\u00f2n \u1edf v\u00f9ng \u00f4n \u0111\u1edbi c\u00f3 nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc kh\u00f4ng giao \u0111\u1ed9ng.<\/p>\n C\u00e2u 52:<\/strong>(ID: 94907)<\/strong>\u1ede g\u00e0, gen quy \u0111\u1ecbnh m\u00e0u s\u1eafc l\u00f4ng n\u1eb1m tr\u00ean v\u00f9ng kh\u00f4ng t\u01b0\u01a1ng \u0111\u1ed3ng c\u1ee7a nhi\u1ec5m s\u1eafc th\u1ec3 gi\u1edbi t\u00ednh X c\u00f3 hai alen, alen A quy \u0111\u1ecbnh l\u00f4ng v\u1eb1n tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen a quy \u0111\u1ecbnh l\u00f4ng kh\u00f4ng v\u1eb1n. Gen quy \u0111\u1ecbnh chi\u1ec1u cao ch\u00e2n n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 th\u01b0\u1eddng c\u00f3 2 alen, alen B quy \u0111\u1ecbnh ch\u00e2n cao tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi alen b quy \u0111\u1ecbnh ch\u00e2n th\u1ea5p. Cho g\u00e0 tr\u1ed1ng l\u00f4ng v\u1eb1n, ch\u00e2n th\u1ea5p thu\u1ea7n ch\u1ee7ng giao ph\u1ed1i v\u1edbi g\u00e0 m\u00e1i l\u00f4ng kh\u00f4ng v\u1eb1n, ch\u00e2n cao thu\u1ea7n ch\u1ee7ng thu \u0111\u01b0\u1ee3c F1. Cho F1 giao ph\u1ed1i v\u1edbi nhau \u0111\u1ec3 t\u1ea1o ra F2. D\u1ef1 \u0111o\u00e1n n\u00e0o sau \u0111\u00e2y v\u1ec1 ki\u1ec3u h\u00ecnh \u1edf F2 l\u00e0 \u0111\u00fang?<\/p>\n A.<\/strong>T\u1ec9 l\u1ec7 g\u00e0 m\u00e1i l\u00f4ng v\u1eb1n, ch\u00e2n th\u1ea5p b\u1eb1ng t\u1ec9 l\u1ec7 g\u00e0 m\u00e1i l\u00f4ng kh\u00f4ng v\u1eb1n, ch\u00e2n th\u1ea5p.<\/p>\n B.<\/strong>T\u1ea5t c\u1ea3 g\u00e0 l\u00f4ng kh\u00f4ng v\u1eb1n, ch\u00e2n cao \u0111\u1ec1u l\u00e0 g\u00e0 tr\u1ed1ng.<\/p>\n C.<\/strong>T\u1ec9 l\u1ec7 g\u00e0 tr\u1ed1ng l\u00f4ng v\u1eb1n, ch\u00e2n th\u1ea5p b\u1eb1ng t\u1ec9 l\u1ec7 g\u00e0 m\u00e1i l\u00f4ng kh\u00f4ng v\u1eb1n, ch\u00e2n cao.<\/p>\n D.<\/strong>T\u1ec9 l\u1ec7 g\u00e0 tr\u1ed1ng l\u00f4ng v\u1eb1n, ch\u00e2n th\u1ea5p b\u1eb1ng t\u1ec9 l\u1ec7 g\u00e0 m\u00e1i l\u00f4ng v\u1eb1n, ch\u00e2n cao.<\/p>\n <\/p>\n \u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh n\u0103m 2015 – \u0110\u1ec1 s\u1ed1 1<\/strong><\/h3>\n <\/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 \u0111\u1ec1 s\u1ed1 1 c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft n\u0103m 2016, c\u00e1c em xem chi ti\u1ebft d\u01b0\u1edbi \u0111\u00e2y. \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n Sinh n\u0103m 2016 – \u0110\u1ec1 s\u1ed1 1 Tr\u1eafc nghi\u1ec7m kh\u00e1ch quan: H\u00e3y khoanh tr\u00f2n v\u00e0o ph\u01b0\u01a1ng \u00e1n \u0111\u00fang nh\u1ea5t: C\u00e2u 1:(ID: 94695)B\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p […]<\/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