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.
Puas chromosomes replicated hauv mitosis?
Raws li qhia ntawm no, DNA rov ua dua thaum lub sijhawm S (theem synthesis) ntawm interphase, uas tsis yog ib feem ntawm mitotic theem. Thaum DNA replicates, ib daim qauv ntawm txhua chromosome yog tsim, yog li chromosomes duplicate.
Puas chromosomes duplicated hauv mitosis lossis meiosis?
Meiosis yog hom kev faib cell uas tsim qe thiab phev hlwb. Mitosis yog txheej txheem tseem ceeb rau lub neej. Thaum lub sij hawm mitosis, ib lub xov tooj ntawm tes duplicates tag nrho nws cov ntsiab lus, suav nrog nws cov chromosomes, thiab sib cais los ua ob lub hlwb zoo tib yam.
Puas rov ua dua hauv meiosis?
Meiosis yog tus yam ntxwv los ntawm ib puag ncig ntawm DNA rov ua raws los ntawm ob puag ncig ntawm cell faib, ua rau cov kab mob haploid.
Puas yog meiosis tau rov ua dua chromosomes?
Meiosis tsim cov hlwb nrog ib nrab ntawm cov chromosomes ua cov cell qub. Haploid hlwb siv hauv kev sib deev, gametes, yog tsim thaum lub sij hawm meiosis, uas muaj ib puag ncig ntawm chromosome replication thiab ob rounds ntawm nuclear division.
