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{"id":22824,"date":"2018-03-20T16:09:56","date_gmt":"2018-03-20T09:09:56","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=22824"},"modified":"2018-03-20T16:09:56","modified_gmt":"2018-03-20T09:09:56","slug":"phan-nam-chuong-2-bai-12-di-truyen-lien-ket-voi-gioi-tinh-va-di-truyen-ngoai-nhan","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/phan-nam-chuong-2-bai-12-di-truyen-lien-ket-voi-gioi-tinh-va-di-truyen-ngoai-nhan\/","title":{"rendered":"Ph\u1ea7n N\u0103m – Ch\u01b0\u01a1ng 2 – B\u00e0i 12: Di truy\u1ec1n li\u00ean k\u1ebft v\u1edbi gi\u1edbi t\u00ednh v\u00e0 di truy\u1ec1n ngo\u00e0i nh\u00e2n"},"content":{"rendered":"

B\u00e0i 1 (trang 53 SGK Sinh h\u1ecdc 12):\u00a0N\u00eau c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m di truy\u1ec1n c\u1ee7a t\u00ednh tr\u1ea1ng do gen n\u1eb1m tr\u00ean NST X quy \u0111\u1ecbnh.<\/strong><\/p>\n

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

\n

C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m di truy\u1ec1n c\u1ee7a t\u00ednh tr\u1ea1ng do gen n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 X quy \u0111\u1ecbnh g\u1ed3m c\u00f3:<\/p>\n

– K\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p lai thu\u1eadn v\u00e0 ngh\u1ecbch l\u00e0 kh\u00e1c nhau, t\u1ee9c l\u00e0 t\u1ec9 l\u1ec7 ph\u00e2n li ki\u1ec3u h\u00ecnh \u1edf hai gi\u1edbi kh\u00e1c nhau.<\/p>\n

– C\u00f3 hi\u1ec7n t\u01b0\u1ee3ng di truy\u1ec1n ch\u00e9o (t\u1eeb \u00f4ng ngo\u1ea1i qua m\u1eb9 xu\u1ed1ng ch\u00e1u trai).<\/p>\n

B\u00e0i 2 (trang 53 SGK Sinh h\u1ecdc 12):\u00a0B\u1ec7nh m\u00f9 m\u00e0u \u0111\u1ecf – xanh l\u1ee5c \u1edf ng\u01b0\u1eddi l\u00e0 do m\u1ed9t gen l\u1eb7n n\u1eb1m tr\u00ean NST X quy \u0111\u1ecbnh. M\u1ed9t ph\u1ee5 n\u1eef b\u00ecnh th\u01b0\u1eddng c\u00f3 em trai b\u1ecb b\u1ec7nh m\u00f9 m\u00e0u l\u1ea5y m\u1ed9t ng\u01b0\u1eddi ch\u1ed3ng b\u00ecnh th\u01b0\u1eddng. N\u1ebfu c\u1eb7p v\u1ee3 ch\u1ed3ng n\u00e0y sinh \u0111\u01b0\u1ee3c m\u1ed9t ng\u01b0\u1eddi con trai th\u00ec x\u00e1c su\u1ea5t \u0111\u1ec3 ng\u01b0\u1eddi con trai \u0111\u00f3 b\u1ecb b\u1ec7nh m\u00f9 m\u00e0u l\u00e0 bao nhi\u00eau? Bi\u1ebft r\u1eb1ng b\u1ed1 m\u1eb9 c\u1ee7a c\u1eb7p v\u1ee3 ch\u1ed3ng n\u00e0y \u0111\u1ec1u kh\u00f4ng b\u1ecb b\u1ec7nh.<\/strong><\/p>\n

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

– Quy \u01b0\u1edbc gen: M: quy \u0111\u1ecbnh b\u00ecnh th\u01b0\u1eddng<\/p>\n

m: quy \u0111\u1ecbnh b\u1ec7nh m\u00f9 m\u00e0u<\/p>\n

– Em trai m\u1eafc b\u1ec7nh m\u00f9 m\u00e0u c\u00f3 KG: Xm<\/sub>Y nh\u1eadn 1 giao t\u1eed Xm<\/sub>\u00a0t\u1eeb m\u1eb9 v\u00e0 Y t\u1eeb b\u1ed1.<\/p>\n

V\u1eady, m\u1eb9 c\u00f3 KG: XM<\/sub>Xm<\/sub>\u00a0v\u00e0 b\u1ed1 c\u00f3 KG: XM<\/sub>Y<\/p>\n

– S\u01a1 \u0111\u1ed3 lai:<\/p>\n

P: XM<\/sub>Xm<\/sub>\u00a0\u00d7 XM<\/sub>Y<\/p>\n

F1<\/sub>: XM<\/sub>XM<\/sub>, XM<\/sub>Xm<\/sub>, XM<\/sub>Y, Xm<\/sub>Y<\/p>\n

– Hai v\u1ee3 ch\u1ed3ng b\u00ecnh th\u01b0\u1eddng sinh con trai m\u1eafc b\u1ec7nh th\u00ec ng\u01b0\u1eddi v\u1ee3 ph\u1ea3i c\u00f3 ki\u1ec3u gen d\u1ecb h\u1ee3p XM<\/sub>Xm<\/sub>v\u1edbi x\u00e1c su\u1ea5t l\u00e0 1\/2.<\/p>\n

X\u00e1c su\u1ea5t xu\u1ea5t hi\u1ec7n con trai c\u1ee7a h\u1ecd m\u1eafc b\u1ec7nh m\u00f9 m\u00e0u l\u00e0:<\/p>\n

1\/2 \u00d7 1\/2 = 1\/4<\/p>\n

B\u00e0i 3 (trang 53 SGK Sinh h\u1ecdc 12):\u00a0L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c m\u1ed9t b\u1ec7nh n\u00e0o \u0111\u00f3 (\u1edf ng\u01b0\u1eddi) l\u00e0 do gen l\u1eb7n n\u1eb1m tr\u00ean NST gi\u1edbi t\u00ednh X hay do gen tr\u00ean NST th\u01b0\u1eddng quy \u0111\u1ecbnh?<\/strong><\/p>\n

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

\n

\u00a0 \u00a0 C\u00f3 th\u1ec3 theo d\u00f5i ph\u1ea3 h\u1ec7 \u0111\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c b\u1ec7nh di truy\u1ec1n do gen l\u1eb7n n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 th\u01b0\u1eddng hay tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 X quy \u0111\u1ecbnh nh\u1edd \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a s\u1ef1 di truy\u1ec1n li\u00ean k\u1ebft v\u1edbi gi\u1edbi t\u00ednh.<\/p>\n

B\u00e0i 4 (trang 54 SGK Sinh h\u1ecdc 12):\u00a0N\u00eau \u0111\u1eb7c \u0111i\u1ec3m di truy\u1ec1n c\u1ee7a gen ngo\u00e0i nh\u00e2n. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c t\u00ednh tr\u1ea1ng n\u00e0o \u0111\u00f3 l\u00e0 do gen trong nh\u00e2n hay gen n\u1eb1m ngo\u00e0i nh\u00e2n quy \u0111\u1ecbnh?<\/strong><\/p>\n

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

* \u0110\u0103\u0323c \u0111i\u00ea\u0309m di truy\u00ea\u0300n cu\u0309a gen ngoa\u0300i nh\u00e2n la\u0300:<\/p>\n

– K\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p lai thu\u1eadn v\u00e0 ngh\u1ecbch kh\u00e1c nhau.<\/p>\n

– \u0110\u01a1\u0300i con lu\u00f4n co\u0301 ki\u00ea\u0309u hi\u0300nh gi\u1ed1ng me\u0323.<\/p>\n

* D\u00f9ng ph\u00e9p lai thu\u1eadn ngh\u1ecbch c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c t\u00ednh tr\u1ea1ng n\u00e0o \u0111\u00f3 do gen trong nh\u00e2n hay gen ngo\u00e0i nh\u00e2n quy \u0111\u1ecbnh.<\/p>\n

V\u00ed d\u1ee5, khi lai thu\u1eadn, ngh\u1ecbch \u1edf c\u00e2y hoa m\u01b0\u1eddi gi\u1edd th\u00ec thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 kh\u00e1c nhau:<\/p>\n

– Lai thu\u1eadn:<\/p>\n

P: \u2640C\u00e2y l\u00e1 \u0111\u1ed1m \u00d7 \u2642C\u00e2y l\u00e1 xanh<\/p>\n

\u2192 F1<\/sub>\u00a0: 100% C\u00e2y l\u00e1 \u0111\u1ed1m.<\/p>\n

– Lai ngh\u1ecbch:<\/p>\n

P: \u2640C\u00e2y l\u00e1 xanh \u00d7 \u2642C\u00e2y l\u00e1 \u0111\u1ed1m<\/p>\n

\u2192 F1<\/sub>\u00a0: 100% C\u00e2y l\u00e1 xanh.<\/p>\n

Trong th\u00ed nghi\u1ec7m tr\u00ean , s\u1ef1 di truy\u1ec1n t\u00ednh tr\u1ea1ng l\u00e1 \u0111\u1ed1m li\u00ean quan v\u1edbi t\u1ebf b\u00e0o ch\u1ea5t \u1edf c\u00e2y m\u1eb9 l\u00e1 \u0111\u1ed1m( lai thu\u1eadn), c\u00f2n s\u1ef1 di truy\u1ec1n t\u00ednh tr\u1ea1ng l\u00e1 xanh ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a t\u1ebf b\u00e0o ch\u1ea5t c\u1ee7a c\u00e2y m\u1eb9 l\u00e1 xanh (lai ngh\u1ecbch). V\u00ec v\u1eady hi\u1ec7n t\u01b0\u1ee3ng di truy\u1ec1n n\u00e0y l\u00e0 di truy\u1ec1n t\u1ebf b\u00e0o ch\u1ea5t( hay di truy\u1ec1n ngo\u00e0i nh\u00e2n ho\u1eb7c ngo\u00e0i NST). Do con lai mang t\u00ednh tr\u1ea1ng c\u1ee7a m\u1eb9 n\u00ean di truy\u1ec1n t\u1ebf b\u00e0o ch\u1ea5t \u0111\u01b0\u1ee3c xem l\u00e0 di truy\u1ec1n theo d\u00f2ng m\u1eb9. Nh\u01b0ng kh\u00f4ng ph\u1ea3i m\u1ecdi hi\u1ec7n t\u01b0\u1ee3ng di truy\u1ec1n theo d\u00f2ng m\u1eb9 \u0111\u1ec1u l\u00e0 di truy\u1ec1n t\u1ebf b\u00e0o ch\u1ea5t.<\/p>\n

B\u00e0i 5 (trang 54 SGK Sinh h\u1ecdc 12):\u00a0N\u1ebfu k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p lai thu\u1eadn v\u00e0 ph\u00e9p lai ngh\u1ecbch kh\u00e1c nhau \u1edf 2 gi\u1edbi (\u1edf lo\u00e0i c\u00f3 c\u01a1 ch\u1ebf t\u1ebf b\u00e0o h\u1ecdc x\u00e1c \u0111\u1ecbnh gi\u1edbi t\u00ednh ki\u1ec3u XX \u2013 XY) th\u00ec k\u1ebft lu\u1eadn n\u00e0o \u0111\u01b0\u1ee3c r\u00fat \u1edf d\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111\u00fang?<\/strong><\/p>\n

\u00a0 \u00a0 a) Gen quy \u0111\u1ecbnh t\u00ednh tr\u1ea1ng n\u1eb1m \u1edf NST gi\u1edbi t\u00ednh X.<\/strong><\/p>\n

b) Gen quy \u0111\u1ecbnh t\u00ednh tr\u1ea1ng n\u1eb1m trong ti th\u1ec3.<\/p>\n

c) Gen quy \u0111\u1ecbnh t\u00ednh tr\u1ea1ng n\u1eb1m tr\u00ean NST Y.<\/p>\n

d) Kh\u00f4ng c\u00f3 k\u1ebft lu\u1eadn n\u00e0o n\u00eau tr\u00ean l\u00e0 \u0111\u00fang.<\/p>\n

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

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

 <\/p>\n

\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

B\u00e0i 1 (trang 53 SGK Sinh h\u1ecdc 12):\u00a0N\u00eau c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m di truy\u1ec1n c\u1ee7a t\u00ednh tr\u1ea1ng do gen n\u1eb1m tr\u00ean NST X quy \u0111\u1ecbnh. L\u1eddi gi\u1ea3i: C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m di truy\u1ec1n c\u1ee7a t\u00ednh tr\u1ea1ng do gen n\u1eb1m tr\u00ean nhi\u1ec5m s\u1eafc th\u1ec3 X quy \u0111\u1ecbnh g\u1ed3m c\u00f3: – K\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p lai thu\u1eadn v\u00e0 ngh\u1ecbch […]<\/p>\n","protected":false},"author":3,"featured_media":0,"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":"\nPh\u1ea7n N\u0103m - Ch\u01b0\u01a1ng 2 - B\u00e0i 12: Di truy\u1ec1n li\u00ean k\u1ebft v\u1edbi gi\u1edbi t\u00ednh v\u00e0 di truy\u1ec1n ngo\u00e0i nh\u00e2n<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/phan-nam-chuong-2-bai-12-di-truyen-lien-ket-voi-gioi-tinh-va-di-truyen-ngoai-nhan\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ph\u1ea7n N\u0103m - Ch\u01b0\u01a1ng 2 - B\u00e0i 12: Di truy\u1ec1n li\u00ean k\u1ebft v\u1edbi gi\u1edbi t\u00ednh v\u00e0 di truy\u1ec1n ngo\u00e0i nh\u00e2n\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 53 SGK Sinh h\u1ecdc 12):\u00a0N\u00eau c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m di truy\u1ec1n c\u1ee7a t\u00ednh tr\u1ea1ng do gen n\u1eb1m tr\u00ean NST X quy \u0111\u1ecbnh. 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