Cov txheej txheem:
Video: Dab tsi yog qee qhov piv txwv ntawm tus tsim cov nyhuv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Piv txwv ntawm Founder Effect
Cov kev coj ua ntawm pawg ntseeg suav nrog endogamy, lossis kev sib yuav hauv kev ntseeg, thiab polygyny lossis kev coj ua ob peb poj niam.
Raws li, qhov twg yog ib qho piv txwv ntawm cov nyhuv hauv lub raj mis?
Cov lub cev tsis muaj zog yog qhov kawg piv txwv ntawm genetic drift uas tshwm sim thaum qhov loj ntawm cov pej xeem raug txo qis heev. Cov xwm txheej zoo li kev puas tsuaj ntuj tsim (xws li av qeeg, dej nyab, hluav taws kub) tuaj yeem txiav txim siab rau cov pej xeem, tua cov tib neeg feem ntau thiab tawm hauv qhov me me, random assortment of survivors.
Tsis tas li ntawd, qhov txawv ntawm bottleneck effect thiab founder effect yog dab tsi? Cov qhov sib txawv ntawm tus tsim xwm txheej thiab cov pejxeem tsis muaj dab tsi yog hom kev tshwm sim uas ua rau lawv. A tus tsim qhov xwm txheej tshwm sim thaum ib pab pawg neeg tsawg raug cais tawm ntawm cov pej xeem, whereas a lub cev tsis muaj zog tshwm sim thaum feem coob ntawm cov pejxeem raug puas tsuaj.
Ib yam li ntawd, tib neeg nug, tus tsim txiaj tshwm sim li cas?
Cov tus tsim teebmeem yog qhov txo qis hauv kev hloov pauv caj ces tshwm sim thaum ib tug me me subset ntawm cov pejxeem loj yog siv los tsim ib tug tshiab colony. Cov pej xeem tshiab yuav txawv ntawm cov neeg qub, ob qho tib si ntawm nws cov genotypes thiab phenotypes.
Yog vim li cas tus founder nyhuv yog piv txwv ntawm genetic drift?
Cov tus tsim teebmeem yog qhov kawg piv txwv ntawm "genetic drift ." Cov noob tshwm sim ntawm qee zaus hauv cov pej xeem loj yuav tshwm sim ntawm qhov sib txawv - ntau dua los yog tsawg dua - hauv ib qho me me ntawm cov pejxeem.
Pom zoo:
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