Thaum xaiv tsis muaj zog?
Thaum xaiv tsis muaj zog?

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Video: Thaum xaiv tsis muaj zog?
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Kev xaiv tsis muaj zog hauv evolutionary biology yog thaum cov tib neeg uas muaj cov phenotypes sib txawv muaj qhov zoo sib xws, piv txwv li ib qho phenotype tsis muaj zog dua lwm tus. Kev xaiv tsis muaj zog, yog li ntawd, yog txoj kev xav hloov pauv los piav qhia txog kev saib xyuas ntawm ntau yam phenotypes hauv cov pejxeem ruaj khov.

Vim li cas kev xaiv tsis muaj zog hauv cov neeg tsawg?

Genetic drift: Genetic variation yog txiav txim siab los ntawm kev sib koom ua ke ntawm kev xaiv ntuj thiab genetic drift (xov xwm). Hauv cov neeg me, kev xaiv tsis tshua muaj txiaj ntsig, thiab qhov tseem ceeb ntawm cov noob caj noob ces yog siab dua vim tias kev tshem tawm cov alleles tuaj yeem ua ntau zaus thiab 'kho' hauv cov pej xeem vim muaj caij nyoog.

Kev xaiv muaj zog txhais li cas?

Abstract. Kev xaiv muaj zog txhais tau hais tias nrawm dua evolution-uas yog, lub zog ntau dua, qhov hloov pauv sai dua. Qhov no pom tau tias nws tus kheej pom tseeb, txawm li cas los xij, tau muab los ntawm qhov kev xav tias kev hloov pauv caj ces hauv cov neeg feem ntau yog muab los ntawm kev hloov pauv (piv txwv li kev hloov pauv-tsav kev hloov pauv).

Dab tsi yog qhov tsis muaj zog allele?

Recessiveness: "tsis muaj zog" allele. Lub recessive allele tsuas yog qhia yog tias ob qho tib si tam sim no. Tsuas yog ib daim ntawv yog xav tau rau cov tseem ceeb allele. Cov allele recessive feem ntau txhais tau tias yog tsab ntawv qis, qhov tseem ceeb allele feem ntau txhais tau tias yog tsab ntawv loj.

roob robertson cuam tshuam dab tsi?

Hill–Robertson cuam tshuam yog ib qho tshwm sim uas, nyob rau hauv cov pej xeem finite, kev xaiv ua ntawm ib qho chaw txo cov kev ua tau zoo ntawm kev xaiv ntawm kev sib txuas loci (Hill and Robertson 1966; Felsenstein 1974; Comeron et al. 2008)..

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