Ua ntej cov chromosomes sib npaug tuaj yeem sib cais thiab faib sib npaug rau ob tus ntxhais lub hlwb thaum lub sijhawm mitosis, txawm li cas los xij, lawv yuav tsum tau teeb tsa kom tsim nyog, thiab cov txheej txheem no pib hauv S theem.
Yuav ua li cas cov ntxhais cell muaj tib tus lej ntawm chromosomes tom qab mitosis?
Mitosis tsim ob tus ntxhais zoo tib yam uas txhua tus muaj tib tus lej ntawm chromosomes li lawv niam lawv txiv. Hauv qhov sib piv, meiosis ua rau muaj plaub tus ntxhais tshwj xeeb, txhua tus muaj ib nrab ntawm cov chromosomes raws li niam txiv cell.
Pob cov hlwb puas muaj ib nrab chromosomes?
Txhua tus ntxhais ntawm tes yog haploid thiab tsuas muaj ib pawg chromosomes, lossis ib nrab ntawm tag nrho cov chromosomes ntawm thawj cell. Meiosis II yog ib qho mitotic faib ntawm txhua lub hlwb haploid uas tsim hauv meiosis I.
Yuav ua li cas yog cov ntxhais cell tsis zoo ib yam?
Yog hais tias cov chromosomes faib tsis sib npaug thaum lub sij hawm mitosis, ib tug ntxhais cell yuav muaj trisomy, txhais tau hais tias nws muaj peb daim ntawv ntawm ib tug chromosomes es tsis txhob ntawm ib txwm ob, thiab cov lwm tus yuav tsis muaj chromosome. Lub sij hawm dav dav rau qhov tsis sib npaug ntawm tus lej chromosome yog aneuploidy.
Puas muaj pes tsawg chromosomes txhua tus ntxhais cell muaj?
Thaum kawg ntawm mitosis, ob tug ntxhais cell yuav yog cov ntawv luam ntawm tus thawj cell. Txhuantxhais cell yuav muaj 30 chromosomes.
