Mutasion nazariya – nasldan- naslga beriladigan uzilishli (diskret) o’zgaruvchanlikni tan oluvchi nazariya. Gollandiyalik botanik X. De Friz to- monidan ishlab chiqilgan (1901-03). M.n.ning asosiy xossalari: mutasiya oraliq formalarsiz to’satdan paydo bo’ladi; formalar butunlay konstant, ya’ni barqaror; mutasiyalar si-Fat o’zgarishlar bo’lib, uzluksiz qatorlar hosil qilmasligi va o’rtacha tip (moda) atrofida guruxlanmasligi b-n irsiy- lanmaydigan o’zgarishlar (fluktasiya- lar)dan farq qiladi; mutasiyalar turli yo’nalishda sodir bo’ladi, ular foydali va zararli bo’lishi; aynan bir mutasiya- ning o’zi qayta takrorlanishi mumkin. De Friz M.n.ni tabiiy tanlanish na- zariyasiga qarshi qo’yib, mutasiyalar tufayli tabiiy tanlanishning ishti- roKisiz birdaniga yangi turlar paydo bo’ladi, degan noto’g’ri xulosaga kelgan. Haqiqatda esa mutasion o’zgaruvchanlik kombinativ o’zgaruvchanlik b-n bir qatorda evolyusion jara-yonda yangi tur- larning shakllanishiga olib keladigan tabiiy tanlanish uchun material beradi. Keyinchalik De Frizning xatosi u eks- periment o’tkazgan enotera (Oenothera Iamarkina) o’simligining murakkab poli- geterozigota (q. Geterozigota) ekanligi, De Friz mutasiya sifatida qabul qilgan o’zgarishlar esa ana shu geterozigotanng ajralishi b-n bog’liqligi aniqlandi. Shunday bo’lsada, keyinchalik mutasion o’zgaruvchanlikning mavjudligi ko’plab tadqiqotchilar tomonidan tasdiqlandi va M.n.ning asosiy g’oyalari yanada rivoj- lanib, tajribalarda o’z isbotini topdi (q. Mutasiya).<\/p>\n","protected":false},"excerpt":{"rendered":"
Mutasion nazariya – nasldan- naslga beriladigan uzilishli (diskret) o’zgaruvchanlikni tan oluvchi nazariya. Gollandiyalik botanik X. De Friz to- monidan ishlab chiqilgan (1901-03). M.n.ning asosiy xossalari: mutasiya oraliq formalarsiz to’satdan paydo … 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":[217],"tags":[],"class_list":["post-117239","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-m-harfi","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","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\/117239","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=117239"}],"version-history":[{"count":1,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/117239\/revisions"}],"predecessor-version":[{"id":117246,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/117239\/revisions\/117246"}],"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=117239"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/categories?post=117239"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/tags?post=117239"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}