Selectively nruab nrab yog dab tsi?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Ib qho xwm txheej uas cov phenotypic tshwm sim ntawm qee yam mutant alleles sib npaug rau cov tsiaj qus-hom allele nyob rau hauv cov nqe lus ntawm lawv lub cev muaj nuj nqis. Saib nruab nrab gene theory, ntsiag to mutations. Los ntawm: xaiv nruab nrab nyob rau hauv phau ntawv txhais lus ntawm Genetics »

Ib yam li ntawd, dab tsi yog qhov nruab nrab gene?

Los ntawm Wikipedia, dawb encyclopedia. Cov nruab nrab Txoj kev xav ntawm molecular evolution tuav tau tias feem ntau evolutionary hloov ntawm qib molecular, thiab feem ntau ntawm cov variation nyob rau hauv thiab ntawm hom, yog vim random. caj ces drift ntawm mutant alleles uas yog xaiv nruab nrab.

Tom qab ntawd, lo lus nug yog, nws txhais li cas rau ib qho allele ua nruab nrab nrog rau kev xaiv ntuj? Raws li qhov kev xav no, yog tias cov pej xeem muaj ntau yam sib txawv alleles ntawm ib qho gene, qhov txawv yog tias txhua tus ntawm cov yog alleles sib npaug zoo ntawm kev ua nws txoj haujlwm - hauv lwm lo lus, qhov kev hloov pauv ntawd yog nruab nrab : seb koj nqa allele A los yog allele B ua tsis cuam tshuam koj lub cev.

Ua raws li qhov no, qhov piv txwv ntawm kev hloov pauv nruab nrab yog dab tsi?

Piv txwv ntawm nruab nrab mutations yuav yog cov kev hloov pauv ntawm cov lus sib txawv hauv cov kab ke caj ces (cov kab ke uas tsim cov protein ntau), uas cuam tshuam rau cov cheeb tsam uas tsis yog coding ntawm chromosome (saib cov noob caj noob ces), los yog ua rau muaj kev hloov pauv tsis zoo (xws li hom ntshav lossis qhov muag xim hauv tib neeg).

Cov yam ntxwv nruab nrab puas tuaj yeem hloov tau?

Qhov no muaj peev xwm tshwm sim vim, piv txwv li, cov noob txhim kho fertility. Thaum koj tab tom xav txog qhov evolution ntawm nruab nrab (los yog ze li ntawm nruab nrab ) yam ntxwv koj tab tom xav txog evolution ntawm thawj peb lub tswv yim (mutation, migration, drift).