Nyob hauv noob caj noob ces, chiasma (pl. … Ntawm qhov muab chiasma, kev sib pauv ntawm cov khoom siv caj ces tuaj yeem tshwm sim ntawm ob qho tib si chromatids, dab tsi hu ua chromosomal crossover chromosomal crossover Chromosomal crossover, lossis hla, yog Kev sib pauv ntawm cov khoom siv caj ces thaum muaj kev sib deev ntawm ob homologous chromosomes 'tsis yog tus muam chromatids uas ua rau cov chromosomes recombinant. wikipedia.org › wiki › Chromosomal_crossover
Chromosomal crossover - Wikipedia
tab sis qhov no tshwm sim ntau zaus thaum meiosis dua mitosis. Hauv meiosis, qhov tsis muaj chiasma feem ntau ua rau tsis raug chromosomal cais thiab aneuploidy.
Chiasmata ua rau theem twg?
Chiasmata yog tsim nyob rau hauv Diplotene theem ntawm prophase 1. Nco tseg: Hauv prophase I ntawm meiosis hla dhau qhov chaw. Lub ntsiab lus ntawm txoj kev hla mus yog hu ua chiasmata.
YPuas chiasmata tsim nyob rau hauv meiosis?
Chiasma yog ib qho qauv uas forms ntawm ib khub ntawm homologous chromosomes los ntawm crossover recombination thiab lub cev txuas cov homologous chromosomes thaum lub sij hawm meiosis.
Puas hla dhau tshwm sim hauv mitosis?
Nws yog qhov xav tsis thoob rau cov noob caj noob ces pom tias kev hla dhau tuaj yeem tshwm sim ntawm mitosis. Nco ntsoov tias nws yuav tsum tshwm sim thaum homologous chromosomal ntuyog ua ke ua ke nyob rau hauv asexual hlwb xws li lub cev hlwb. … Mitotic hla dhau tsuas yog tshwm sim hauv cov hlwb diploid xws li lub cev hlwb ntawm cov kab mob diploid.
Puas muaj homologs 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.
