Thaum meiosis I, cov chromosomes pib ua khub ntawm Zygotene.
Lub sijhawm twg ntawm meiosis ua chromosomes pib ua khub?
Chromosome pairing yog hais txog qhov ntev ntawm kev sib raug zoo ntawm homologous chromosomes ntawm the prophase theem ntawm meiosis. Cov kab mob sib deev feem ntau muaj ob pawg chromosomes, ib pawg tau txais los ntawm txhua tus niam txiv.
Nyob rau theem twg ntawm meiosis 1 khub ntawm homologous chromosomes pib?
In prophase I ntawm meiosis, homologous chromosomes tsim cov tetrads. Hauv metaphase I, cov khub no nyob rau ntawm qhov chaw nruab nrab ntawm ob tus ncej ntawm tes los tsim cov phaj metaphase.
Yuav ua li cas rau chromosomes thaum lub sij hawm meiosis 1?
Hauv Meiosis 1, chromatin condenses rau chromosomes, lawv khub (prophase 1), lawv sib dhos hauv kab (metaphase 1), txhua chromosome los ntawm ib khub yog sib cais thiab thauj. mus rau opposite ncej (thaum lub sij hawm anaphase 1), ces chromosomes decondense thiab lub hnab ntawv nuclear nyob ib ncig ntawm lawv (telophase 1), uas ploj lawm hauv prophase 1.
Pob chromosomes khub hauv meiosis 1?
Nyob rau hauv prophase I ntawm meiosis kuv, txhua chromosome yog raws li nws homologous khub thiab khub kiag li. Hauv prophase I, DNA tau dhau los ua qhov rov ua dua yog li txhua tus chromosome muaj ob lub chromatids zoo tib yam txuas los ntawm ib qho centromere.
