Dab tsi theem ntawm meiosis ua ywj siab assortment tshwm sim?
Dab tsi theem ntawm meiosis ua ywj siab assortment tshwm sim?

Video: Dab tsi theem ntawm meiosis ua ywj siab assortment tshwm sim?

Video: Dab tsi theem ntawm meiosis ua ywj siab assortment tshwm sim?
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Thaum lub sij hawm meiosis, kev ywj pheej assortment yuav ua ntej thiab tom qab ntawd hla yuav ua. Tsis yog, kev ywj pheej assortmentoccurs tom qab hla dhau. Hla dhau tshwm sim nyob rau hauv prophase Iwhile ywj siab assortment tshwm sim nyob rau hauv metaphase kuv thiab anaphase Kuv.

Tom qab ntawd, theem twg ntawm meiosis zoo tshaj plaws piav qhia txog kev ywj pheej Assortment?

Txoj cai ntawm Kev ywj pheej Assortment . Thaum lub sij hawm metaphase ntawm meiosis Kuv, synapsed khub ntawm homologouschromosomes (lub npe hu ua bivalents los yog tetrads) yog nyob rau ntawm animaginary dav hlau nyob rau hauv nruab nrab ntawm lub cell hu ua metaphaseplate. Cov chromosomes txuas nrog spindle fibers ntawm lawv cov centromeres.

Ib yam li ntawd, puas muaj kev ywj pheej nyob hauv meiosis 2? - Quora. Tsis yog, Meiosis II Nws ua haujlwm zoo ib yam li mitosis thiab muaj tib theem. Cov chromosomenumber tseem nyob haploid, thiab cov ntxhais cell yog genetically zoo tib yam rau niam txiv cell.

Tsis tas li cov lus nug yog, yuav ua li cas thiab nyob rau theem twg yog qhov kev ywj pheej ua tiav?

Thaum twg Cov hlwb sib faib thaum lub sij hawm meiosis, homologouschromosomes yog randomly faib thaum lub sij hawm anaphase I, cais thiab cais. ywj siab ntawm ib leeg. Qhov no hu ua ywj siab assortment . Nws ua rau gametes uas muaj kev sib xyaw ua ke ntawm chromosomes.

Dab tsi theem ntawm meiosis qhia txog lub hauv paus ntsiab lus ntawm kev ywj pheej assortment?

Thaum Metaphase thiab Anaphase , thaum thehomologous chromosomes kab thiab sib cais ntawm random alignmentsrelative rau ib leeg. Dab tsi yog qhov tseem ceeb ntawm Mendel's peaplant sim?

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