Nyob rau hauv meiosis, chromosomes los yog chromosomes duplicate ( thaum interphase ) thiab homologous chromosomes pauv cov ntaub ntawv keeb kwm (chromosomal crossover chromosomal crossover Chromosomal crossover, lossis hla dhau, yog Kev sib pauv ntawm cov khoom siv caj ces thaum muaj kev sib deev ntawm ob homologous chromosomes 'tsis yog tus muam chromatids uas ua rau cov chromosomes recombinant. wikipedia.org › wiki › Chromosomal_crossover
Chromosomal crossover - Wikipedia
) thaum lub sijhawm thawj zaug, hu ua meiosis I. Cov ntxhais hlwb sib faib dua hauv meiosis II, faib cov muam chromatids los ua haploid gametes.
Lub sijhawm twg theem ntawm meiosis puas DNA rov ua dua?
Thaum the S theem, DNA yog synthesized nyob rau hauv tus txheej txheem ntawm DNA replication. Hauv lub voj voog meiotic, interphase tau muab faib ua interphase I thiab interphase II.
Puas DNA rov ua dua thaum lub sijhawm meiosis?
Meiosis yog tus yam ntxwv los ntawm ib puag ncig ntawm DNA rov ua rawslos ntawm ob qhov sib faib ntawm tes, ua rau cov kab mob haploid. Kev hla dhau ntawm DNA ua rau muaj kev sib pauv ntawm cov noob ntawm niam thiab txiv DNA.
DNA replicate hauv meiosis nyob qhov twg?
2) Tawm ntawm txhua theem DNA rov ua dua tsuas yog tshwm sim hauv the S theem ntawm meiosis. Tag nrho meiosis cell voj voog tsuas muaj ib qho Stheem uas txhais tau hais tias DNA yuav tau rov ua dua ib zaug hauv tag nrho cov kev faib meiotic. 3) Lub voj voog meiosis ntawm tes tshwj tsis yog theem M tseem hu ua interphase.
DNA replication koom nrog hauv meiosis li cas?
Meiosis yog qhov tshwj xeeb ntawm tes faib uas suav nrog chromosome replication, ob qhov sib cais ntawm chromosome thiab ua rau tsim cov gametes. Meiotic DNA replication feem ntau ua ntej chromosome pairing, recombination thiab synapsis hauv kev sib deev eukaryotes.
