Chiasmata yog X-zoo li tus qauv tsim vim qhov chaw ntawm kev sib cuag ntawm khub chromatids thaum lub sij hawm meiosis. Nws yog lub ntsiab lus uas sawv cev rau crossover qhov twg homologous chromosomes koom ua ke.
Chiasmata hauv biology yog dab tsi?
Lub chiasma yog tus qauv uas tsim ntawm ib khub ntawm homologous chromosomes los ntawm crossover recombination thiab lub cev txuas cov homologous chromosomes thaum lub sij hawm meiosis.
Chiasmata nrog daim duab yog dab tsi?
Kos daim duab qhia koj cov lus teb. Chiasmata- Cov no yog cov ntsiab lus ntawm kev sib txuas ntawm homologous chromosomes thaum lawv sib cais hauv diplotene rau metaphase I theem ntawm meiosis. Chiasmata yog thawj zaug tsim nyob rau hauv cheeb tsam ntawm kev hla ntawm nonsister chromatids tab sis tom qab ntawd, zoo li hloov mus rau sab.
Chiasmata yog dab tsi thiab tau txais txiaj ntsig dab tsi?
Nyob hauv noob caj noob ces, chiasma (pl. chiasmata) yog qhov kev sib cuag, qhov sib txuas ntawm lub cev, ntawm ob (tsis yog tus muam) chromatids belongs rau homologous chromosomes. … Hauv meiosis, qhov tsis muaj chiasma feem ntau ua rau tsis raug chromosomal cais thiab aneuploidy.
Yuav ua li cas yog chiasma?
Cov qauv no yog tsim thaum hla ntawm cov tsis yog tus muam chromatids tshwm sim. Chiasmata tseem ceeb vim tias nws yog lub ntsiab lus uas cov noob ntawm niam thiab txiv sib pauv thiab ua rau rov ua dua. Qhov no recombination yogqhov pauv mus rau tus xeeb ntxwv uas ua kom muaj kev sib txawv.
