Dab tsi yog anaphase hauv meiosis?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Anaphase Kuv pib thaum ob lub chromosomes ntawm txhua bivalent (tetrad) sib cais thiab pib txav mus rau cov ncej ntawm lub xov tooj ntawm tes raws li qhov tshwm sim ntawm qhov kev ua ntawm spindle. Pom tias hauv anaphase Kuv tus muam chromatids tseem txuas ntawm lawv cov centromeres thiab txav mus ua ke mus rau cov ncej.

Ua raws li qhov no, yuav ua li cas tshwm sim hauv anaphase 1 ntawm meiosis uas tsis tshwm sim hauv anaphase ntawm mitosis?

Ib qho kev hloov kho yog nyob rau hauv meiosis I . Kev tsis sib haum xeeb tuaj yeem tshwm sim thaum lub sijhawm anaphase ntawm mitosis , meiosis I , los yog meiosis II. Thaum anaphase , tus muam chromatids (los yog homologous chromosomes rau meiosis I ), yuav sib cais thiab txav mus rau cov ncej ntawm tes, rub los ntawm microtubules. Hauv nondisjunction, kev sib cais tsis tshwm sim.

Tsis tas li ntawd, qhov tseem ceeb ntawm anaphase 1 yog dab tsi? 1 ) Anaphase feem ntau ua kom ntseeg tau tias txhua tus ntxhais cell muaj tib tus lej ntawm chromosomes raws li niam txiv cell. 2) Anaphase feem ntau ua kom ntseeg tau tias txhua tus ntxhais cell muaj ob zaug ntau chromosomes li niam txiv cell. 3) Ib anaphase , cell splits nyob rau hauv ib nrab. 4) Ib anaphase , DNA yog replicated.

Ntawm no, dab tsi tshwm sim hauv anaphase II ntawm meiosis?

Thaum anaphase II , peb kauj ruam ntawm meiosis II , tus muam chromatids ntawm txhua tus chromosome cais thiab txav mus rau cov ncej. Thaum lawv tsis txuas ntxiv lawm, cov qub chromatids hu ua unreplicated chromosomes.

Muaj pes tsawg chromosomes nyob rau hauv anaphase hauv meiosis?

Thaum lub sij hawm anaphase, peb tam sim no muaj tag nrho ntawm 16 chromosomes thiab 16 chromatids - luv luv, txhua chromatid tam sim no yog chromosome. Ib yam li ntawd, hauv tib neeg, muaj 92 chromosome ua tam sim no thiab 92 chromatids thaum lub sij hawm anaphase. Cov lej no tseem zoo ib yam thaum lub sijhawm telophase.