B\u00e0i 1 (trang 45 SGK Sinh h\u1ecdc 12):\u00a0H\u00e3y gi\u1ea3i th\u00edch c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa gen v\u00e0 t\u00ednh tr\u1ea1ng sau \u0111\u00e2y v\u00e0 cho bi\u1ebft ki\u1ec3u quan h\u1ec7 n\u00e0o l\u00e0 ch\u00ednh x\u00e1c h\u01a1n:<\/strong><\/p>\n

– M\u1ed9t gen quy \u0111\u1ecbnh m\u1ed9t t\u00ednh tr\u1ea1ng.<\/strong><\/p>\n

– M\u1ed9t gen quy \u0111\u1ecbnh m\u1ed9t enzim \/ protein.<\/strong><\/p>\n

– M\u1ed9t gen quy \u0111\u1ecbnh m\u1ed9t chu\u1ed7i polipeptit.<\/strong><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ph\u00e1t bi\u1ec3u “m\u1ed9t gen quy \u0111\u1ecbnh m\u1ed9t chu\u1ed7i polipeptit l\u00e0 ch\u00ednh x\u00e1c h\u01a1n c\u1ea3:<\/p>\n

– M\u1ed9t protein c\u00f3 th\u1ec3 g\u1ed3m nhi\u1ec1u chu\u1ed7i polipeptit kh\u00e1c nhau c\u1ea5u t\u1ea1o n\u00ean (cu\u0300ng quy \u0111i\u0323nh).<\/p>\n

– M\u1ed9t t\u00ednh tr\u1ea1ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh b\u1edfi nhi\u1ec1u lo\u1ea1i protein kh\u00e1c nhau.<\/p>\n

– M\u1ed9t gen c\u00f3 th\u1ec3 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn s\u1ef1 bi\u1ec3u hi\u1ec7n c\u1ee7a nhi\u1ec1u t\u00ednh tr\u1ea1ng kh\u00e1c nhau.<\/p>\n

B\u00e0i 2 (trang 45 SGK Sinh h\u1ecdc 12):\u00a0Trong m\u1ed9t th\u00ed nghi\u1ec7m, ng\u01b0\u1eddi ta cho c\u00e2y hoa \u0111\u1ecf lai v\u1edbi c\u00e2y hoa tr\u1eafng v\u00e0 thu \u0111\u01b0\u1ee3c F_{1<\/sub>\u00a0to\u00e0n hoa \u0111\u1ecf. Cho c\u00e1c c\u00e2y F1<\/sub>\u00a0t\u1ef1 th\u1ee5 ph\u1ea5n, thu \u0111\u01b0\u1ee3c c\u00e1c c\u00e2y F2<\/sub>\u00a0v\u1edbi t\u1ec9 l\u1ec7 ph\u00e2n li ki\u1ec3u h\u00ecnh l\u00e0 245 c\u00e2y hoa tr\u1eafng \u00e0 315 c\u00e2y hoa \u0111\u1ecf. H\u00e3y gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3 lai v\u00e0 vi\u1ebft s\u01a1 \u0111\u1ed3 lai t\u1eeb th\u1ebf h\u1ec7 P t\u1edbi F1<\/sub>\u00a0v\u00e0 F2<\/sub>.<\/strong><\/p>\n}

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

– Quy \u01b0\u1edbc gen:<\/p>\n

A: quy \u0111\u1ecbnh hoa \u0111\u1ecf<\/p>\n

a: quy \u0111\u1ecbnh hoa tr\u1eafng<\/p>\n

– Theo gi\u1ea3 thi\u1ebft, t\u1ec9 l\u1ec7 ki\u1ec3u h\u00ecnh \u1edf F_{2<\/sub>\u00a0l\u00e0 315 (\u0111\u1ecf) : 245 (tr\u1eafng) ~ 9 : 7. F1<\/sub>\u00a0c\u00f3 16 t\u1ed5 h\u1ee3p gen = 4 \u00d7 4 v\u00e0 nh\u01b0 v\u1eady c\u01a1 th\u1ec3 F1<\/sub>\u00a0ph\u1ea3i l\u00e0 d\u1ecb h\u1ee3p t\u1eed v\u1ec1 2 c\u1eb7p gen n\u1eb1m tr\u00ean 2 c\u1eb7p NST t\u01b0\u01a1ng \u0111\u1ed3ng kh\u00e1c nhau. T\u1ec9 l\u1ec7 F2<\/sub>\u00a0l\u00e0 9 : 7 # 9 : 3 : 3 : 1 n\u00ean t\u00ednh tr\u1ea1ng m\u00e0u hoa do 2 c\u1eb7p gen quy \u0111\u1ecbnh v\u00e0 t\u00e1c \u0111\u1ed9ng theo ki\u1ec3u t\u01b0\u01a1ng t\u00e1c b\u1ed5 sung.<\/p>\n}

– S\u01a1 \u0111\u1ed3 lai:<\/p>\n

<\/p>\n

Ki\u1ec3u gen: 9A \u2013 B\u2013: 3A \u2013 bb : 3aaB \u2013 :1aabb<\/p>\n

Ki\u1ec3u h\u00ecnh: 9 \u0111\u1ecf : 7 tr\u1eafng.<\/p>\n

B\u00e0i 3 (trang 45 SGK Sinh h\u1ecdc 12):\u00a0Hai alen thu\u1ed9c c\u00f9ng m\u1ed9t gen c\u00f3 th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau hay kh\u00f4ng? Gi\u1ea3i th\u00edch.<\/strong><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Hai alen c\u1ee7a c\u00f9ng m\u1ed9t gen c\u00f3 th\u1ec3 t\u01b0\u01a1ng t\u00e1c \u0111\u01b0\u1ee3c v\u1edbi nhau:<\/p>\n

– Tr\u01b0\u1eddng h\u1ee3p th\u1ee9 nh\u1ea5t l\u00e0 m\u1ed9t alen tr\u1ed9i, m\u1ed9t alen l\u1eb7n ho\u00e0n to\u00e0n.<\/p>\n

– Tr\u01b0\u1eddng h\u1ee3p th\u1ee9 hai l\u00e0 m\u1ed9t tr\u1ed9i kh\u00f4ng ho\u00e0n to\u00e0n (cho t\u00ednh tr\u1ea1ng trung gian).<\/p>\n

– Tr\u01b0\u1eddng h\u1ee3p th\u1ee9 ba l\u00e0 c\u1ea3 2 alen \u0111\u1ed3ng tr\u1ed9i.<\/p>\n

B\u00e0i 4 (trang 45 SGK Sinh h\u1ecdc 12):\u00a0S\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c gen c\u00f3 m\u00e2u th\u1eabn g\u00ec v\u1edbi c\u00e1c quy lu\u1eadt ph\u00e2n li c\u1ee7a c\u00e1c alen hay kh\u00f4ng? T\u1ea1i sao?<\/strong><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

S\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c gen kh\u00f4ng m\u00e2u thu\u1eabn v\u1edbi c\u00e1c quy lu\u1eadt c\u1ee7a Men\u0111en v\u00ec t\u01b0\u01a1ng t\u00e1c gen l\u00e0 s\u1ef1 t\u00e1c \u0111\u1ed9ng qua l\u1ea1i gi\u1eefa c\u00e1c s\u1ea3n ph\u1ea9m c\u1ee7a gen, kh\u00f4ng ph\u1ea3i b\u1ea3n th\u00e2n c\u00e1c gen.<\/p>\n

T\u01b0\u01a1ng t\u00e1c gen kh\u00f4ng ph\u1ee7 nh\u1eadn h\u1ecdc thuy\u1ebft Men\u0111en m\u00e0 ch\u1ec9 m\u1edf r\u1ed9ng th\u00eam h\u1ecdc thuy\u1ebft Men\u0111en.<\/p>\n

B\u00e0i 5 (trang 45 SGK Sinh h\u1ecdc 12):\u00a0H\u00e3y ch\u1ecdn ph\u01b0\u01a1ng \u00e1n tr\u1ea3 l\u1eddi \u0111\u00fang: Th\u1ebf n\u00e0o l\u00e0 gen \u0111a hi\u1ec7u?<\/strong><\/p>\n

\u00a0 \u00a0 a) Gen t\u1ea1o ra nhi\u1ec1u lo\u1ea1i mARN.<\/strong><\/p>\n

\u00a0b) Gen \u0111i\u1ec1u khi\u1ec3n s\u1ef1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c gen kh\u00e1c.<\/strong><\/p>\n

\u00a0 \u00a0 c) Gen m\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a n\u00f3 c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nhi\u1ec1u t\u00ednh tr\u1ea1ng kh\u00e1c nhau.<\/strong><\/p>\n

\u00a0 \u00a0 d) Gen t\u1ea1o ra s\u1ea3n ph\u1ea9m v\u1edbi hi\u1ec7u qu\u1ea3 r\u1ea5t cao.<\/strong><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

\u0110\u00e1p \u00e1n: c.<\/p>\n

 <\/p>\n

 <\/p>\n

\n","protected":false},"excerpt":{"rendered":"

B\u00e0i 1 (trang 45 SGK Sinh h\u1ecdc 12):\u00a0H\u00e3y gi\u1ea3i th\u00edch c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa gen v\u00e0 t\u00ednh tr\u1ea1ng sau \u0111\u00e2y v\u00e0 cho bi\u1ebft ki\u1ec3u quan h\u1ec7 n\u00e0o l\u00e0 ch\u00ednh x\u00e1c h\u01a1n: – M\u1ed9t gen quy \u0111\u1ecbnh m\u1ed9t t\u00ednh tr\u1ea1ng. – M\u1ed9t gen quy \u0111\u1ecbnh m\u1ed9t enzim \/ protein. – M\u1ed9t gen quy \u0111\u1ecbnh m\u1ed9t […]<\/p>\n","protected":false},"author":3,"featured_media":22840,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1307],"tags":[1397,1398],"yoast_head":"\n