T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 12 – Arkady Leokum<\/p>\n\n\n\n
N\u1ebfu \u0111\u00e0n \u00f4ng c\u0169ng c\u00f3 gi\u00e1 tr\u1ecb nh\u01b0 ph\u1ee5 n\u1eef v\u1ec1 m\u1eb7t sinh s\u1ea3n, \u0111i\u1ec1u n\u00e0y \u0111\u00e3 kh\u00f4ng c\u00f2n l\u00e0 m\u1ed9t c\u00e2u \u0111\u1ed1 l\u1edbn, nh\u01b0ng th\u1eadt t\u1ebf th\u00ec \u0111\u00e0n \u00f4ng l\u1ea1i kh\u00f4ng qu\u00fd gi\u00e1 v\u1ec1 m\u1eb7t sinh s\u1ea3n nh\u01b0 v\u1eady. V\u00ec \u0111\u00e0n \u00f4ng c\u00f3 th\u1ec3 sinh ra m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn con ch\u00e1u trong kho\u1ea3ng th\u1eddi gian m\u00e0 ph\u1ee5 n\u1eef ch\u1ec9 mang thai m\u1ed9t l\u1ea7n. V\u1eady t\u1ea1i sao l\u1ea1i kh\u00f4ng c\u00f3 m\u1ed9t t\u1ec9 l\u1ec7 gi\u1edbi t\u00ednh kh\u00e1c, v\u00ed d\u1ee5 nh\u01b0 1 nam cho 50 n\u1eef?<\/p>\n\n\n\n
L\u1eddi gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn r\u1ed9ng r\u00e3i nh\u1ea5t \u0111\u01b0\u1ee3c \u0111\u01b0a ra b\u1edfi nh\u00e0 di truy\u1ec1n h\u1ecdc v\u0129 \u0111\u1ea1i Ronald Fisher n\u0103m 1930: gi\u1ea3 s\u1eed t\u1ec9 l\u1ec7 gi\u1edbi t\u00ednh th\u1eadt s\u1ef1 l\u00e0 1 nam cho 50 n\u1eef, ng\u01b0\u1eddi \u0111\u00e0n \u00f4ng \u0111\u00f3 s\u1ebd c\u00f3 r\u1ea5t nhi\u1ec1u c\u01a1 h\u1ed9i \u0111\u1ec3 k\u1ebft b\u1ea1n t\u00ecnh. V\u00e0 trong qu\u00e1 tr\u00ecnh \u0111\u00f3 s\u1ebd truy\u1ec1n \u0111i nh\u1eefng gen c\u00f3 th\u1ec3 \u01b0u ti\u00ean cho vi\u1ec7c sinh con trai h\u01a1n l\u00e0 sinh con g\u00e1i (v\u00e0 gen \u0111\u00f3 th\u1eadt s\u1ef1 t\u1ed3n t\u1ea1i). Khi con ch\u00e1u c\u1ee7a ng\u01b0\u1eddi \u0111\u00e0n \u00f4ng \u0111\u00f3 t\u0103ng l\u00ean, t\u1ec9 l\u1ec7 gen \u0111\u00f3 trong qu\u1ea7n th\u1ec3 c\u0169ng nh\u01b0 t\u1ec9 l\u1ec7 nam gi\u1edbi trong qu\u1ea7n th\u1ec3 c\u0169ng t\u0103ng l\u00ean, cho \u0111\u1ebfn khi n\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ed9t t\u1ec9 l\u1ec7 50:50. Khi \u0111\u00f3 t\u00ecnh tr\u1ea1ng n\u1eef th\u1eeba nam thi\u1ebfu v\u1ed1n \u0111em l\u1ea1i l\u1ee3i th\u1ebf sinh s\u1ea3n cho nam gi\u1edbi s\u1ebd bi\u1ebfn m\u1ea5t v\u00e0 t\u1ec9 l\u1ec7 nam:n\u1eef s\u1ebd d\u1eebng l\u1ea1i \u1edf 50:50. C\u0169ng nh\u1eefng l\u00fd lu\u1eadn t\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady cho n\u1eef gi\u1edbi, nh\u1edd \u0111\u00f3 t\u1ec9 l\u1ec7 gi\u1edbi t\u00ednh g\u1ea7n nh\u01b0 \u0111\u01b0\u1ee3c gi\u1eef c\u1ed1 \u0111\u1ecbnh theo th\u1eddi gian.<\/p>\n\n\n\n
\u00cdt nh\u1ea5t, \u0111i\u1ec1u \u0111\u00f3 s\u1ebd x\u1ea3y ra n\u1ebfu ch\u1ec9 c\u00f3 gen tham gia v\u00e0o. Trong th\u1ef1c t\u1ebf, ch\u00fang ta c\u00f3 r\u1ea5t nhi\u1ec1u nh\u1eefng y\u1ebfu t\u1ed1 kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 chi ph\u00ed t\u01b0\u01a1ng \u0111\u1ed1i gi\u1eefa vi\u1ec7c nu\u00f4i con trai v\u00e0 con g\u00e1i v\u00e0 gi\u00e1 tr\u1ecb kinh t\u1ebf l\u00e2u d\u00e0i c\u1ee7a ch\u00fang. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 d\u1eabn \u0111\u1ebfn m\u1ed9t h\u00e0nh \u0111\u1ed9ng l\u1ed1 b\u1ecbch l\u00e0 ph\u00e1 thai con g\u00e1i. \u0110i\u1ec1u n\u00e0y \u1edf Trung Qu\u1ed1c \u0111\u01b0\u1ee3c cho r\u1eb1ng l\u00e0 \u0111\u00e3 g\u00f3p ph\u1ea7n v\u00e0o s\u1ef1 d\u01b0 th\u1eeba 20% con trai so v\u1edbi con g\u00e1i.<\/p>\n\n\n\n
Nh\u00ecn chung tr\u00ean c\u1ea3 th\u1ebf gi\u1edbi c\u00f3 kho\u1ea3ng 5% nam nhi\u1ec1u h\u01a1n n\u1eef, nh\u01b0ng \u1edf Anh t\u1ec9 l\u1ec7 gi\u1edbi t\u00ednh l\u1ea1i ng\u01b0\u1ee3c l\u1ea1i, v\u1edbi 5% nam \u00edt h\u01a1n n\u1eef. Th\u1eadt t\u1ebf t\u1ea1i sao th\u00ec v\u1eabn ch\u01b0a r\u00f5 r\u00e0ng.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 12 – Arkady Leokum N\u1ebfu \u0111\u00e0n \u00f4ng c\u0169ng c\u00f3 gi\u00e1 tr\u1ecb nh\u01b0 ph\u1ee5 n\u1eef v\u1ec1 m\u1eb7t sinh s\u1ea3n, \u0111i\u1ec1u n\u00e0y \u0111\u00e3 kh\u00f4ng c\u00f2n l\u00e0 m\u1ed9t c\u00e2u \u0111\u1ed1 l\u1edbn, nh\u01b0ng th\u1eadt t\u1ebf th\u00ec \u0111\u00e0n \u00f4ng l\u1ea1i kh\u00f4ng qu\u00fd gi\u00e1 v\u1ec1 m\u1eb7t sinh s\u1ea3n nh\u01b0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15],"tags":[],"class_list":["post-16189","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=16189"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16189\/revisions"}],"predecessor-version":[{"id":16190,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16189\/revisions\/16190"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=16189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=16189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=16189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}