Video: Dab tsi yog qhov txawv ntawm recombination thiab hla dhau?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hla mus tso cai alleles ntawm DNA molecules hloov txoj hauj lwm los ntawm ib homologous chromosome ntu mus rau lwm. recombination yog lub luag haujlwm rau kev sib txawv ntawm caj ces hauv a hom los yog pejxeem.
Hauv qhov no, puas yog recombination thiab hla dhau qhov qub?
Hauv cov ntsiab lus ntawm meiosis, tsis muaj qhov sib txawv. Cov ntsiab lus feem ntau yog siv sib hloov. Feem ntau, recombination yog ib lo lus dav dav, thiab encompasses ntau hom kev sib pauv caj ces dhau mus hla - dhau . Ua li cas hla - dhau thiab recombination hauv meiosisoccur?
Kuj Paub, lub hom phiaj ntawm recombination hla dhau yog dab tsi? Thaum lub sij hawm qhov txheej txheem no, DNA sequences tuaj yeem sib pauv ntawm homologous chromosomes. Hom kab mob no recombination hu ua hla dhau , thiab tso cai rau cov ntxhais cov hlwb ntawm meiosis ua cov caj ces tshwj xeeb ntawm ib leeg. Hla mus tsuas tuaj yeem tshwm sim ntawm homologouschromosomes.
Ntawm no, qhov txawv ntawm lub ntsiab lus ntawm cov ntsiab lus genetic recombination thiab hla dhau?
Lub ntsiab qhov sib txawv ntawm recombination thiab hla dhau yog tias recombination yog kev tsim khoom ntawm txawv kev sib xyaws ntawm alleles nyob rau hauv cov me nyuam hla dhau yog qhov pauv ntawm caj ces khoom nruab nrab non-viv ncaus chromatids, qhov kev tshwm sim uas tsim tawm recombination.
Dab tsi yog qhov txawv ntawm kev ywj pheej assortment thiab hla dhau?
Genetic variation tshwm sim los ntawm kev ywj pheej vim nws ua tau hauv shuffling ofchromosomes rau hauv ntau gametes. Hla mus tshwm sim thaum homologous chromosomes pauv cov ntaub ntawv ntawm caj ces. Yog li, chromosomes yog tsim uas muaj cov noob los ntawm ob niam txiv. Cov no yog hu ua recombinants.
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