Genlar dreyfi (gollandcha drijven \u2014 suzmoq, quvib haydamoq), Ge- netik-avtomatik jarayonlar \u2014 tasodi- fiy omillar ta’sirida qator avlodlar davomida populyasiyalarda genlar chasto- tasining o’zgarishi. G. D., odatda, populya- tsiyalar irsiy o’zgaruvchanligining pasay- ishiga olib keladi. G. D. tabiiy ofatlar (o’rmonlarning yonishi, suv toshqini), zararkunapdalarning keng tarqalishi va b. natijasida populyasiya individla- ri soni keskin kamayib ketganida aniq namoyon bo’ladi. G. D. tazyiqi ostida po- pulyasiya genotipik tarkibi dinamika- sining xarakterli xususiyati gomozi- gotlanish jarayonining kuchayishidan iborat. Bu hodisa populyasiya arealining torayishi tufayli yaqin qarindosh in- dividlar o’rtasidagi chatishish imkoni- yatining ortishi b-n bog’liq. Natijada tasodifiy ravishda genlar chastotala- rining o’zgarishi tufayli ayrim allel- larning saqlanib qolishi, boshqasining yo’qolishi ro’y beradi. Ajralish payti- da vujudga kelgan ba’zi gomozigotali formalar yangi muhit sharoitiga mos- lanishda qimmatli bo’lib chiqishi va ular tabiiy tanlanish ta’siriga uchrab, keyinchalik populyasiya individlari so- nining orta borishi b-n keng tarqala boshlashi mumkin. G. D. nazariyasi 20-a. ning 40-y.larida amerikalik genetik S. Rayt hamda undan mustaqil ravishda rus olimlari D. D. Romashov va N. P. Dubi- ninlar tomonidan ishlab chiqilgan.<\/p>\n","protected":false},"excerpt":{"rendered":"
Genlar dreyfi (gollandcha drijven \u2014 suzmoq, quvib haydamoq), Ge- netik-avtomatik jarayonlar \u2014 tasodi- fiy omillar ta’sirida qator avlodlar davomida populyasiyalarda genlar chasto- tasining o’zgarishi. G. D., odatda, populya- tsiyalar irsiy … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":99837,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[210],"tags":[],"class_list":["post-134733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-g-harfi-2","entry"],"translation":{"provider":"WPGlobus","version":"3.0.0","language":"kr","enabled_languages":["uz","kr","ru"],"languages":{"uz":{"title":true,"content":true,"excerpt":false},"kr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/134733","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/comments?post=134733"}],"version-history":[{"count":1,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/134733\/revisions"}],"predecessor-version":[{"id":134740,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/134733\/revisions\/134740"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/media\/99837"}],"wp:attachment":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/media?parent=134733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/categories?post=134733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/tags?post=134733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}