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{"id":22933,"date":"2018-03-20T22:11:53","date_gmt":"2018-03-20T15:11:53","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=22933"},"modified":"2018-03-20T22:11:53","modified_gmt":"2018-03-20T15:11:53","slug":"phan-nam-chuong-1-bai-1-gen-ma-di-truyen-va-qua-trinh-nhan-doi-adn","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/phan-nam-chuong-1-bai-1-gen-ma-di-truyen-va-qua-trinh-nhan-doi-adn\/","title":{"rendered":"Ph\u1ea7n N\u0103m – Ch\u01b0\u01a1ng 1 – B\u00e0i 1: Gen, m\u00e3 di truy\u1ec1n v\u00e0 qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i ADN"},"content":{"rendered":"

B\u00e0i 1 (trang 10 SGK Sinh 12):\u00a0Gen l\u00e0 g\u00ec? Cho v\u00ed d\u1ee5 minh h\u1ecda.<\/strong><\/p>\n

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

Gen l\u00e0 m\u1ed9t \u0111o\u1ea1n c\u1ee7a ph\u00e2n t\u1eed ADN mang th\u00f4ng tin m\u00e3 h\u00f3a m\u1ed9t chu\u1ed7i polipeptit hay m\u1ed9t ph\u00e2n t\u1eed ARN.<\/p>\n

– V\u00ed d\u1ee5, gen hemoglobin anpha (Hb \u03b1) l\u00e0 gen m\u00e3 h\u00f3a chu\u1ed7i polipeptit \u03b1 g\u00f3p ph\u1ea7n t\u1ea1o n\u00ean ph\u00e2n t\u1eed Hb trong t\u1ebf b\u00e0o h\u1ed3ng c\u1ea7u; gen tARN m\u00e3 h\u00f3a ph\u00e2n t\u1eed ARN v\u1eadn chuy\u1ec3n\u2026<\/p>\n

B\u00e0i 2 (trang 10 SGK Sinh h\u1ecdc 12):\u00a0Tr\u00ecnh b\u00e0y c\u1ea5u tr\u00fac chung c\u1ee7a c\u00e1c gen m\u00e3 h\u00f3a protein.<\/strong><\/p>\n

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

C\u1ea5u tr\u00fac chung c\u1ee7a gen m\u00e3 h\u00f3a protein: Gen m\u00e3 h\u00f3a protein c\u00f3 3 v\u00f9ng c\u1ea5u tr\u00fac:<\/p>\n

– V\u00f9ng \u0111i\u1ec1u h\u00f2a: n\u1eb1m \u1edf \u0111\u1ea7u 3\u2019 cu\u0309a ma\u0323ch ma\u0303 g\u00f4\u0301c c\u1ee7a gen, c\u00f3 tr\u00ecnh t\u1ef1 nucleotit \u0111\u1eb7c bi\u1ec7t gi\u00fap ARN polimeraza c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft v\u00e0 li\u00ean k\u1ebft \u0111\u1ec3 kh\u1edfi \u0111\u1ed9ng qu\u00e1 tr\u00ecnh phi\u00ean m\u00e3, \u0111\u1ed3ng th\u1eddi c\u0169ng ch\u1ee9a tr\u00ecnh t\u1ef1 nucleotit \u0111i\u1ec1u h\u00f2a qu\u00e1 tr\u00ecnh phi\u00ean m\u00e3.<\/p>\n

– V\u00f9ng m\u00e3 h\u00f3a: ch\u1ee9a th\u00f4ng tin m\u00e3 h\u00f3a c\u00e1c axit amin. C\u00e1c gen \u1edf sinh v\u1eadt nh\u00e2n s\u01a1 c\u00f3 v\u00f9ng m\u00e3 h\u00f3a li\u00ean t\u1ee5c (gen kh\u00f4ng ph\u00e2n m\u1ea3nh). Ph\u1ea7n l\u1edbn c\u00e1c gen c\u1ee7a sinh v\u1eadt nh\u00e2n th\u1ef1c c\u00f3 v\u00f9ng m\u00e3 h\u00f3a kh\u00f4ng li\u00ean t\u1ee5c, xen k\u1ebd c\u00e1c \u0111o\u1ea1n m\u00e3 h\u00f3a axit amin (\u00eax\u00f4n) l\u00e0 c\u00e1c \u0111o\u1ea1n kh\u00f4ng m\u00e3 h\u00f3a axit amin (intron). Do v\u1eady, c\u00e1c gen n\u00e0y c\u00f2n c\u00f3 t\u00ean l\u00e0 gen ph\u00e2n m\u1ea3nh.<\/p>\n

– V\u00f9ng k\u1ebft th\u00fac: n\u1eb1m \u1edf \u0111\u00e2\u0300u 5\u2019 cu\u0309a ma\u0323ch ma\u0303 g\u00f4\u0301c cu\u0309a gen, ch\u1ee9a t\u00edn hi\u1ec7u k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh phi\u00ean m\u00e3.<\/p>\n

B\u00e0i 3 (trang 10 SGK Sinh h\u1ecdc 12):\u00a0Gi\u1ea3i th\u00edch nguy\u00ean t\u1eafc b\u1ed5 sung v\u00e0 nguy\u00ean t\u1eafc b\u00e1n b\u1ea3o t\u1ed3n trong qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i ADN. N\u00eau \u00fd ngh\u0129a c\u1ee7a qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i ADN.<\/strong><\/p>\n

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

* Nguy\u00ean t\u1eafc b\u1ed5 sung: M\u1ea1ch m\u1edbi c\u1ee7a ADN con \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p d\u1ef1a tr\u00ean m\u1ea1ch khu\u00f4n c\u1ee7a ADN m\u1eb9. C\u00e1c nucl\u00ea\u00f4tit \u1edf m\u1ea1ch khu\u00f4n li\u00ean k\u1ebft v\u1edbi c\u00e1c nucl\u00ea\u00f4tit t\u1ef1 do trong m\u00f4i tr\u01b0\u1eddng n\u1ed9i b\u00e0o theo nguy\u00ean t\u1eafc A li\u00ean k\u1ebft v\u1edbi T (b\u1eb1ng 2 li\u00ean k\u1ebft hidro), G li\u00ean k\u1ebft v\u1edbi X (b\u1eb1ng 3 li\u00ean k\u1ebft hidro) hay ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n

* Nguy\u00ean t\u1eafc b\u00e1n b\u1ea3o t\u1ed3n: Trong m\u1ed7i ADN con c\u00f3 m\u1ed9t m\u1ea1ch c\u1ee7a ADN m\u1eb9 (m\u1ea1ch c\u0169), m\u1ea1ch c\u00f2n l\u1ea1i \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p m\u1edbi theo nguy\u00ean t\u1eafc b\u1ed5 sung.<\/p>\n

C\u01a1 ch\u1ebf nh\u00e2n \u0111\u00f4i ADN di\u1ec5n ra theo nguy\u00ean t\u1eafc b\u1ed5 sung v\u00e0 b\u00e1n b\u1ea3o t\u1ed3n. Nh\u1edd \u0111\u00f3, hai ph\u00e2n t\u1eed ADN con \u0111\u01b0\u1ee3c t\u1ea1o ra ho\u00e0n to\u00e0n gi\u1ed1ng nhau v\u00e0 gi\u1ed1ng v\u1edbi ph\u00e2n t\u1eed ADN m\u1eb9. C\u01a1 ch\u1ebf t\u1ef1 nh\u00e2n \u0111\u00f4i c\u00f3 \u00fd ngh\u0129a l\u00e0 b\u1ea3o \u0111\u1ea3m duy tr\u00ec b\u1ed9 NST \u0111\u1eb7c tr\u01b0ng c\u1ee7a lo\u00e0i qua c\u00e1c th\u1ebf h\u1ec7 t\u1ebf b\u00e0o.<\/p>\n

B\u00e0i 4 (trang 10 SGK Sinh h\u1ecdc 12):\u00a0M\u00e3 di truy\u1ec1n c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m g\u00ec?<\/strong><\/p>\n

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

M\u00e3 di truy\u1ec1n c\u00f3 m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sau:<\/p>\n

– M\u00e3 di truy\u1ec1n \u0111\u01b0\u1ee3c \u0111\u1ecdc t\u1eeb m\u1ed9t \u0111i\u1ec3m x\u00e1c \u0111\u1ecbnh theo t\u1eebng b\u1ed9 ba nucleotit m\u00e0 kh\u00f4ng g\u1ed1i l\u00ean nhau.<\/p>\n

– M\u00e3 di truy\u1ec1n c\u00f3 t\u00ednh ph\u1ed5 bi\u1ebfn, t\u1ee9c l\u00e0 t\u1ea5t c\u1ea3 c\u00e1c lo\u00e0i \u0111\u1ec1u c\u00f3 chung m\u1ed9t b\u1ed9 m\u00e3 di truy\u1ec1n, tr\u1eeb m\u1ed9t v\u00e0i ngo\u1ea1i l\u1ec7.<\/p>\n

– M\u00e3 di truy\u1ec1n c\u00f3 t\u00ednh \u0111\u1eb7c hi\u1ec7u, t\u1ee9c l\u00e0 m\u1ed9t b\u1ed9 ba ch\u1ec9 m\u00e3 h\u00f3a cho m\u1ed9t lo\u1ea1i axit amin.<\/p>\n

– M\u00e3 di truy\u1ec1n mang t\u00ednh tho\u00e1i h\u00f3a, t\u1ee9c l\u00e0 nhi\u1ec1u b\u1ed9 ba kh\u00e1c nhau c\u00f9ng x\u00e1c \u0111\u1ecbnh m\u1ed9t lo\u1ea1i axit amin, tr\u1eeb AUG v\u00e0 UGG.<\/p>\n

B\u00e0i 5 (trang 10 SGK Sinh h\u1ecdc 12):\u00a0H\u00e3y gi\u1ea3i th\u00edch v\u00ec sao tr\u00ean m\u1ed7i ch\u1ea1c ch\u1eef Y ch\u1ec9 c\u00f3 m\u1ed9t m\u1ea1ch c\u1ee7a ph\u00e2n t\u1eed ADN \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p li\u00ean t\u1ee5c, m\u1ea1ch c\u00f2n l\u1ea1i \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p m\u1ed9t c\u00e1ch gi\u00e1n \u0111o\u1ea1n.<\/strong><\/p>\n

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

Tr\u00ean m\u1ed7i ch\u1ea1c ch\u1eef Y ch\u1ec9 c\u00f3 m\u1ed9t m\u1ea1ch c\u1ee7a ph\u00e2n t\u1eed AND \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p li\u00ean t\u1ee5c, m\u1ea1ch c\u00f2n l\u1ea1i \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p m\u1ed9t c\u00e1ch gi\u00e1n \u0111o\u1ea1n l\u00e0 do c\u1ea5u tr\u00fac c\u1ee7a ph\u00e2n t\u1eed AND c\u00f3 2 m\u1ea1ch polinucleotit \u0111\u1ed1i song song<\/p>\n

\"\"<\/p>\n

, m\u00e0 enzim polimeraza ch\u1ec9 t\u1ed5ng h\u1ee3p m\u1ea1ch m\u1edbi theo chi\u1ec1u 5\u2019 \u2192 3\u2019 n\u00ean tr\u00ean m\u1ea1ch khu\u00f4n 3\u2019 \u2192 5\u2019 m\u1ea1ch b\u1ed5 sung \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p li\u00ean t\u1ee5c, c\u00f2n tr\u00ean m\u1ea1ch khu\u00f4n 5\u2019 \u2192 3\u2019 m\u1ea1ch b\u1ed5 sung \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p ng\u1eaft qu\u00e3ng t\u1ea1o n\u00ean c\u00e1c \u0111o\u1ea1n ng\u1eafn (\u0111o\u1ea1n Okazaki), r\u1ed3i sau \u0111\u00f3 c\u00e1c \u0111o\u1ea1n Okazaki \u0111\u01b0\u1ee3c n\u1ed1i l\u1ea1i nh\u1edd enzim n\u1ed1i AND ligaza.<\/p>\n

B\u00e0i 6 (trang 10 SGK Sinh h\u1ecdc 12):\u00a0H\u00e3y ch\u1ecdn ph\u01b0\u01a1ng \u00e1n tr\u1ea3 l\u1eddi \u0111\u00fang.<\/strong><\/p>\n

Vai tr\u00f2 c\u1ee7a enzim ADN polimeraza trong qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i ADN l\u00e0:<\/strong><\/p>\n

\u00a0 \u00a0 a) Th\u00e1o xo\u1eafn ph\u00e2n t\u1eed ADN.<\/strong><\/p>\n

\u00a0 \u00a0 b) B\u1ebb g\u00e3y c\u00e1c li\u00ean k\u1ebft hidro gi\u1eefa hai m\u1ea1ch ADN.<\/strong><\/p>\n

\u00a0 \u00a0 c) L\u1eafp r\u00e1p c\u00e1c nucleotit t\u1ef1 do theo nguy\u00ean t\u1eafc b\u1ed5 sung v\u1edbi m\u1ed7i m\u1ea1ch khu\u00f4n c\u1ee7a ADN.<\/strong><\/p>\n

\u00a0 \u00a0 d) C\u1ea3 a, b, c.<\/strong><\/p>\n

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

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

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

B\u00e0i 1 (trang 10 SGK Sinh 12):\u00a0Gen l\u00e0 g\u00ec? Cho v\u00ed d\u1ee5 minh h\u1ecda. L\u1eddi gi\u1ea3i: Gen l\u00e0 m\u1ed9t \u0111o\u1ea1n c\u1ee7a ph\u00e2n t\u1eed ADN mang th\u00f4ng tin m\u00e3 h\u00f3a m\u1ed9t chu\u1ed7i polipeptit hay m\u1ed9t ph\u00e2n t\u1eed ARN. – V\u00ed d\u1ee5, gen hemoglobin anpha (Hb \u03b1) l\u00e0 gen m\u00e3 h\u00f3a chu\u1ed7i polipeptit \u03b1 g\u00f3p ph\u1ea7n t\u1ea1o […]<\/p>\n","protected":false},"author":3,"featured_media":22936,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1307],"tags":[1373,1398],"yoast_head":"\nPh\u1ea7n N\u0103m - Ch\u01b0\u01a1ng 1 - B\u00e0i 1: Gen, m\u00e3 di truy\u1ec1n v\u00e0 qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i ADN<\/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-1-bai-1-gen-ma-di-truyen-va-qua-trinh-nhan-doi-adn\/\" \/>\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 1 - B\u00e0i 1: Gen, m\u00e3 di truy\u1ec1n v\u00e0 qu\u00e1 tr\u00ecnh nh\u00e2n \u0111\u00f4i ADN\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 10 SGK Sinh 12):\u00a0Gen l\u00e0 g\u00ec? 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