Dab tsi yog qhov hla dhau thaum lub sijhawm prophase 1?
Dab tsi yog qhov hla dhau thaum lub sijhawm prophase 1?

Video: Dab tsi yog qhov hla dhau thaum lub sijhawm prophase 1?

Video: Dab tsi yog qhov hla dhau thaum lub sijhawm prophase 1?
Video: luag tsis hlub kuv - sonie thoj nkauj tshiab 2024, Kaum ib hlis
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Hla mus tshwm sim ntawm prophase 1 thiab metaphase 1 thiab yog cov txheej txheem uas homologouschromosomes ua ke nrog ib leeg thiab sib pauv cov ntu sib txawv ntawm lawv cov khoom siv caj ces los ua cov chromosomes recombinant. Nws kuj tshwm sim thaum mitotic division, uas yuav ua rau inloss ntawm heterozygosity.

Hais txog qhov no, dab tsi tshwm sim thaum hla hauv prophase 1 ntawm meiosis?

Thaum theem ntawm no meiosis , chromosomes yuav pom, hla - tshaj tshwm sim , cov nucleolusdisappears, the meiotic spindle cov ntaub ntawv, thiab lub hnab ntawv nuclear ploj mus. Thaum pib ntawm prophase Kuv, thechromosomes twb duplicated. Hla - dhau yog cov txheej txheem uas tuaj yeem ua rau geneticrecombination.

Ib sab saum toj no, vim li cas kev hla dhau tshwm sim hauv prophase 1? Lwm yam kev hloov caj ces yog los ntawm hla kev , uas may tshwm sim thaum prophase kuv ofmeiosis. Hauv prophase Kuv ntawm meiosis, qhov hloov pauv homologouspair ntawm chromosomes tuaj ua ke hauv cov txheej txheem hu ua synapsis, thiab cov seem ntawm cov chromosomes sib pauv.

Ib yam li ntawd, koj tuaj yeem nug, Puas yog Kev Hla Dhau tshwm sim hauv prophase 1?

Kev hla dhau tshwm sim nruab nrab prophase Iand metaphase I thiab yog cov txheej txheem uas ob homologous chromosomenon-viv ncaus chromatids ua ke nrog ib leeg thiab sib pauv sib txawv ntawm cov khoom siv caj ces los ua ob tus muam chromosome recombinantchromosome.

Dab tsi tshwm sim thaum lub sijhawm prophase kuv?

Thaum lub sij hawm prophase I , lawv coil thiab ua shorterand thicker thiab pom nyob rau hauv lub teeb microscope. Duplicatedhomologous chromosomes khub, thiab hla dhau (kev sib hloov ntawm lub cev ntawm chromosome) tshwm sim . Lub hnab ntawv nuclear ploj lawm ntawm kawg ntawm prophase kuv , cia cov spindle nkag mus rau hauv lub nucleus.

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