Video: Dab tsi yog g2 theem ntawm interphase?
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 xovtooj 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.
Dhau li ntawd, dab tsi tshwm sim hauv g1 S thiab g2 theem ntawm interphase?
Interphase yog tsim los ntawm G1 Phase (kev loj hlob ntawm tes), 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.
Qhov thib ob, S theem yog dab tsi hauv interphase? Cov S theem ntawm lub voj voog ntawm tes tshwm sim thaum lub sijhawm interphase , ua ntej mitosis los yog meiosis, thiab yog lub luag hauj lwm rau cov synthesis los yog replication ntawm DNA. Nyob rau hauv txoj kev no, cov khoom siv caj ces ntawm lub xov tooj ntawm tes yog ob npaug ua ntej nws nkag mus rau mitosis lossis meiosis, tso cai kom muaj DNA txaus los faib rau hauv cov menyuam ntxhais.
Ib yam li ntawd, nws tau nug, pes tsawg chromosomes nyob rau hauv g2 interphase?
Rau tib neeg, qhov no txhais tau hais tias thaum lub sij hawm prophase thiab metaphase ntawm mitosis, tib neeg yuav muaj 46 chromosome ua , tab sis 92 chromatids (dua, nco ntsoov tias muaj 92 chromatids vim hais tias tus thawj 46 chromosome ua tau duplicated thaum S theem ntawm interphase).
DNA ntau npaum li cas 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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S theem ntawm lub voj voog ntawm tes tshwm sim thaum lub sij hawm interphase, ua ntej mitosis los yog meiosis, thiab yog lub luag hauj lwm rau cov synthesis los yog replication ntawm DNA. Nyob rau hauv txoj kev no, cov khoom siv caj ces ntawm lub xov tooj ntawm tes yog ob npaug ua ntej nws nkag mus rau mitosis lossis meiosis, cia kom muaj DNA txaus los faib rau hauv cov menyuam ntxhais
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