Thaum spermatogenesis, plaub cov phev tshwm sim los ntawm txhua tus thawj spermatocyte. Meiosis pib nrog lub cell hu ua thawj spermatocyte. Thaum kawg ntawm thawj qhov kev faib meiotic, a haploid cell yog tsim hu ua cov spermatocyte thib ob. Lub xovtooj ntawm no yog haploid thiab yuav tsum dhau mus rau lwm qhov kev faib cell meiotic.
Yuav ua li cas yog qhov kawg ntawm thawj meiotic division?
Ob lub hlwb haploid yog qhov kawg tshwm sim ntawm thawj qhov kev faib meiotic. Cov hlwb yog haploid vim ntawm txhua tus ncej, tsuas yog ib qho ntawm txhua khub ntawm homologous chromosomes. Yog li ntawd, tsuas yog ib qho tag nrho ntawm chromosomes tam sim no.
Yuav ua li cas yog thawj qhov kev faib meiotic?
Qhov tshwm sim ntawm thawj lub cell faib yog ob lub hlwb ywj pheej. Ib lub cell muaj cov niam txiv homologous khub, los yog tus muam chromatids, nrog ib ntu me me ntawm leej txiv chromosome los ntawm kev sib tw. Lwm lub xovtooj muaj cov niam txiv homologous khub nrog ib ntu me me ntawm niam txiv chromosome.
Thaum thawj qhov kev faib meiotic tshwm sim?
Thawj meiotic faib pib nrog a ntev prophase, uas tau faib ua tsib theem. Thaum lub sij hawm leptotene (Greek, "thin thread") theem, chromatin ntawm chromatids yog ncab tawm heev, thiab nws tsis tuaj yeem txheeb xyuas tus neeg chromosomes.
Qhov twg feem ntau tshwm sim hauv thawj qhov kev faib meiotic?
In meiosis, thechromosomes los yog chromosomes duplicate (thaum lub sij hawm interphase) thiab homologous chromosomes pauv genetic ntaub ntawv (chromosomal crossover) thaum thawj zaug, hu ua meiosis I. Cov ntxhais hlwb faib dua nyob rau hauv meiosis II, splitting tus muam chromatids. tsim haploid gametes.
