Ib daim ntawv ntawm kev sib tw tsis sib xws yog kev sib txuas, uas tshwm sim thaum cov tib neeg uas muaj cov genotypes zoo sib xws feem ntau yuav ua phooj ywg nrog ib leeg es tsis yog cov tib neeg uas muaj cov genotypes sib txawv. … Txawm hais tias kev yug me nyuam tuaj yeem ua rau txo qis ntawm kev hloov pauv ntawm caj ces, kev yug me nyuam tuaj yeem ua rau nce.
Puas random mating nce genetic variation?
Mendelian cais tawm muaj cov cuab yeej uas random mating ua rau muaj kev sib npaug ntawm cov genotypes tom qab tsuas yog ib tiam, yog li caj ces hloov pauv tau khaws cia.
Yuav ua li cas yog qhov txiaj ntsig ntawm kev sib tw tsis sib xws?
Like recombination, non-random mating can ua raws li txheej txheem ntxiv rau kev xaiv ntuj tsim kom muaj kev hloov pauv tshwm sim. Txhua qhov kev tawm mus los ntawm kev sib raug zoo tsis sib haum ua rau qhov sib npaug ntawm cov genotypes hauv cov pej xeem. Qhov no yuav tshwm sim txawm tias kev xaiv khub niam txiv yog qhov zoo lossis qhov tsis zoo.
Puas tsis yog kev sib koom ua ke ntawm kev sib txawv?
Kev sib raug zoo tsis sib xws yuav tsis ua rau cov neeg nyob hauv cov pejxeem hloov ntawm nws tus kheej, txawm tias nws tuaj yeem hloov pauv genotype zaus. Qhov no ua rau cov pej xeem tsis nyob hauv Hardy-Weinberg equilibrium, tab sis nws yog debatable seb nws suav li evolution, vim hais tias cov allele frequencies nyob tib yam.
Kev sib raug zoo tsis sib xws cuam tshuam li cas rau txhua zaus?
Qhov no yog qhov txiaj ntsig zoo: kev sib tw tsis sib xws, txawm tiasnyob rau hauv daim ntawv phem tshaj plaws ntawm nws tus kheej fertilization, tsis cuam tshuam rau allele zaus. Selfing ua rau genotype zaus hloov pauv raws li qhov zaus ntawm homozygotes nce thiab qhov zaus ntawm heterozygotes txo qis, tab sis cov zaus allele tseem nyob tas li.
