Cov theem ntawm mitosis A bivalent chromosome muaj ob tug muam chromatids (DNA strands uas yog replicas ntawm ib leeg). … Hauv kauj ruam thib ob, prophase, cov chromosomes bivalent condense rau hauv cov pob nruj, cov ntaub ntawv mitotic spindle, thiab lub hnab ntawv nuclear dissolves.
Pob bivalents tshwm sim hauv mitosis?
Cov theem ntawm mitosis
qauv tshiab no hu ua bivalent chromosome Ib chromosome bivalent muaj ob tug muam chromatids (DNA strands uas yog replicas ntawm ib leeg). Thaum lub chromosome tshwm sim tsuas yog ib qho chromatid, tsuas yog ib qho DNA strand thiab nws cov proteins uas cuam tshuam, nws hu ua monovalent chromosome.
Dab tsi yog bivalents hauv meiosis?
Thaum lub sijhawm prophase ntawm meiosis kuv, homologous chromosomes khub thiab tsim synapses. Cov chromosomes ua ke yog hu ua bivalents. Cov bivalent muaj ob chromosomes thiab plaub chromatids, nrog ib chromosome los ntawm txhua tus niam txiv.
Do Tetrads hauv mitosis lossis meiosis?
Tetrads tsis tshwm sim hauv mitosis vim tsis muaj kev hla dhau. Hauv mitosis, cov chromosomes raug coj mus rau qhov sib npaug ntawm lub cell tsis hla. Tsis muaj kev sib pauv ntawm cov ntaub ntawv caj ces ntawm chromosomes.
Puas yog bivalents tsim nyob rau hauv meiosis 2?
Meiosis I & II
Nws yog kauj ruam hauv meiosis uas tsim muaj ntau haiv neeg. DNA replication precedes precedes pib ntawm meiosis I. … Cov chromosomes ua ke yog hu ua bivalents, thiab tsim ntawm chiasmata tshwm sim los ntawm genetic recombination ua pom tseeb. Chromosomal condensation tso cai rau cov no los saib hauv lub microscope.
