Video: Yuav ua li cas tshwm sim hauv g2 theem?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov kawg ntawm interphase yog hu ua G2 Phase . Lub cell tau loj hlob, DNA tau rov ua dua, thiab tam sim no lub xovtooj yuav luag npaj los faib. Qhov kawg theem no yog txhua yam hais txog kev npaj cov cell rau mitosis lossis meiosis. Thaum lub sij hawm G2 Phase , lub cell yuav tsum loj hlob ib co ntxiv thiab tsim tej molecules nws tseem yuav tsum tau faib.
Hais txog qhov no, dab tsi tshwm sim hauv g1 S thiab g2 theem ntawm interphase?
Interphase yog tsim los ntawm G1 Phase (cell loj hlob), ua raws li S theem (DNA synthesis), ua raws li G2 Phase (kev loj hlob ntawm tes). Thaum kawg ntawm interphase los ntawm mitotic theem , uas yog tsim los ntawm mitosis thiab cytokinesis thiab ua rau kev tsim ntawm ob tug ntxhais hlwb.
g2 sawv rau dab tsi thiab dab tsi tshwm sim hauv theem no? Qhov no yog qhov theem thaum DNA replication tshwm sim . Cov G2 theem sawv for "GAP 2". Tus M theem sawv rau "mitosis", thiab yog thaum nuclear (chromosomes cais) thiab cytoplasmic (cytokinesis) faib tshwm sim.
Tib neeg kuj nug, vim li cas g2 theem tseem ceeb?
Cov DNA duplicated yog nyob rau hauv daim ntawv ntawm chromatin, thiab nws condenses los tsim cov chromosomes tshiab. Thaum lub G2 Phase yog ib tseem ceeb Qhov tseem ceeb hauv kev tswj kev loj hlob ntawm tes rau cov kab mob siab heev, nws tsis yog qhov tseem ceeb rau kev faib tawm ntawm tes.
DNA ntau npaum li cas nyob rau hauv g2 theem?
Chromosome Cohesion G2 theem thiab qhov pib ntawm mitosis yog qhia los ntawm 4-N DNA cov ntsiab lus. Ua raws DNA replication thiab ua ntej cell division (cytokinesis), cov hlwb yuav tsum muaj kev ncaj ncees thiab sib thooj ntawm cov chromosomes tsis ntev los no duplicated (tus muam chromatids).
Pom zoo:
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