Nyob rau hauv txhua lub cell somatic ntawm lub cev, lub nucleus muaj ob daim ntawv theej ntawm txhua tus chromosome, hu ua homologous chromosomes. Somatic hlwb qee zaum hu ua "lub cev" hlwb. Homologous chromosomes yog cov khub uas muaj tib lub noob nyob rau hauv tib qhov chaw raws lawv qhov ntev.
Puas muaj homologous khub hauv mitosis?
Nco ntsoov tias, hauv mitosis, homologous chromosomes tsis ua ke. Hauv mitosis, homologous chromosomes kab kawg-rau-kawg thiaj li hais tias thaum lawv sib faib, txhua tus ntxhais ntawm tes tau txais ib tus muam chromatid los ntawm ob tus tswv cuab ntawm cov khub homologous. … Qhov sib txuas nruj ntawm homologous chromosomes hu ua synapsis.
Puas yog homologous chromosomes pom hauv gametes?
Homologous chromosomes yog cov khub uas muaj cov noob rau tib yam hauv qhov chaw zoo tib yam raws li lawv qhov ntev. … Hauv cov tsiaj, cov hlwb haploid uas muaj ib daim qauv ntawm txhua homologous chromosome raug pom tsuas yog hauv gametes. Gametes fuse nrog lwm haploid gamete los tsim ib lub cell diploid.
khub niam txiv sib yuav nyob qhov twg?
In metaphase I ntawm meiosis I, cov khub ntawm homologous chromosomes, tseem hu ua bivalents los yog tetrads, kab nyob rau hauv ib qho random order raws metaphase phaj. Qhov kev taw qhia random yog lwm txoj hauv kev rau cov hlwb los qhia txog kev hloov pauv caj ces.
YPob homologous chromosomes khub hauv meiosis?
Cov xwm txheej tshwm sim hauv meiosis tab sis tsis yog mitosis suav nroghomologous chromosomes ua ke, hla dhau, thiab ua raws li cov phaj metaphase hauv tetrads.
