Puas tuaj yeem hla tau tshwm sim ntawm nonhomologous chromosomes?
Puas tuaj yeem hla tau tshwm sim ntawm nonhomologous chromosomes?

Video: Puas tuaj yeem hla tau tshwm sim ntawm nonhomologous chromosomes?

Video: Puas tuaj yeem hla tau tshwm sim ntawm nonhomologous chromosomes?
Video: Nkauj tawm tshiab _QHov twg los tau _ by Xim vaj & Xeeb vwj & xis nus vaj _ (2020 - 2021 ) 2024, Kaum ib hlis
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Nws puas ua tau rau non-homologous chromosomes mus undergo hla dhau ? Nws ua tau heev. Qhov no yog hu ua translocation. Thaum twg nonhomologous chromosomes yog matched los ntawm kev huam yuaj, cov chromosomes ntoo khaub lig dhau nyob rau hauv ib tug nonsymmetrical zam.

Ib yam li ntawd, koj tuaj yeem nug, tuaj yeem hla dhau ntawm ob chromosomes sib txawv?

Hla hla tshwm sim ntawm prophase kuv thiab metaphase kuv thiab yog tus txheej txheem nyob qhov twg ob homologous chromosome non-viv ncaus chromatids ua ke nrog ib leeg thiab sib pauv txawv ntu ntawm genetic khoom los tsim ob recombinant chromosome tus muam chromatids.

Ib sab saum toj no, qhov txawv ntawm homologous thiab nonhomologous chromosomes yog dab tsi? Lub ntsiab Qhov sib txawv ntawm homologous thiab non-homologous chromosomes yog tias homologous chromosomes muaj alleles ntawm tib hom noob hauv tib loci whereas non-homologous chromosomes muaj cov alleles ntawm txawv hom noob caj noob ces.

Kuj paub, yuav ua li cas yog tias hla dhau ntawm cov chromosomes nonhomologous?

Kev piav qhia: Thaum twg chromatids "hloov dhau , "homologous chromosomes pauv khoom ntawm cov khoom siv noob caj noob ces, ua rau muaj kev sib txuas tshiab ntawm alleles, txawm tias tib cov noob tseem nyob. Kev hla dhau tshwm sim thaum prophase I ntawm meiosis ua ntej tetrads tau ua raws li txoj kab nruab nrab hauv metaphase I.

Yuav ua li cas yog tias kev hla tsis tau tshwm sim?

Tsis muaj hla dhau , txhua tus chromosome yuav yog leej niam lossis leej txiv, txo qis ntau qhov kev sib txuas ntawm caj ces, uas yuav txo tau qhov sib txawv ntawm cov caj ces ntawm cov tib neeg thiab hauv ib hom.

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