Video: Nyob rau theem twg yog lub cell ua ntej mitosis pib?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov cell lub voj voog muaj peb theem uas yuav tsum tshwm sim ua ntej mitosis , los yog cell kev faib, tshwm sim. Cov peb theem no yog sib sau ua ke hu ua interphase. Lawv yog G1, S, thiab G2. G sawv rau qhov sib txawv thiab S sawv rau kev sib txuas.
Tom qab ntawd, ib tug kuj yuav nug, yuav ua li cas tshwm sim rau lub cell ua ntej mitosis pib?
Ua ntej mitosis pib , chromosomes nyob rau hauv lub nucleus cell raug replication. Qhov no yog vim mob mitosis tsim tau ob tug ntxhais hlwb zoo ib yam rau niam txiv cell ; yog li tus naj npawb ntawm chromosomes hauv niam txiv thiab tus ntxhais cell yuav tsum tib yam. Mitosis ua ob diploid hlwb los ntawm ib tug diploid cell.
Ib yam li ntawd, cov txheej txheem dab tsi tshwm sim hauv interphase cell ua ntej pib ntawm mitosis? The S phase of a cell lub voj voog tshwm sim thaum interphase , ua ntej mob mitosis los yog meiosis , thiab yog lub luag haujlwm rau kev sib txuas lossis rov ua dua ntawm DNA. Nyob rau hauv no txoj kev, genetic khoom ntawm a cell yog ob npaug ua ntej nws nkag mob mitosis los yog meiosis , cia kom muaj DNA txaus los faib ua ntxhais hlwb.
Ua li no, dab tsi tshwm sim thaum mitosis xaus?
Mitosis xaus nrog telophase, los yog theem uas cov chromosomes ncav cuag tus ncej. Cov ntaub so ntswg nuclear tom qab ntawd hloov kho, thiab cov chromosomes pib decondense rau hauv lawv cov interphase conformations. Telophase yog ua raws los ntawm cytokinesis, los yog kev faib cov cytoplasm rau hauv ob lub hlwb.
Dab tsi tshwm sim hauv cell thaum lub sijhawm no?
Thawj theem yog interphase thaum qe cov cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum qe cov cell faib thiab hloov ib daim qauv ntawm nws DNA mus rau ob tug ntxhais zoo tib yam hlwb.
Pom zoo:
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DNA yog qhov nyuaj tshaj plaws kom pom ntawm prophase theem ntawm mitosis. Kev piav qhia: Nyob rau theem prophase, tsis muaj cov chromosomes txhais tau zoo. DNA yog tam sim no nyob rau hauv daim ntawv ntawm nyias chromatin fibers uas nyuaj rau pom nyob rau hauv lub microscope
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Nyob rau theem twg DNA nyuaj tshaj plaws pom nyob rau hauv lub tshuab tsom iav?
DNA yog qhov nyuaj tshaj plaws kom pom ntawm prophase theem ntawm mitosis. Kev piav qhia: Nyob rau theem prophase, tsis muaj cov chromosomes txhais tau zoo. DNA yog tam sim no nyob rau hauv daim ntawv ntawm nyias chromatin fibers uas nyuaj rau pom nyob rau hauv lub microscope
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