Video: Yuav ua li cas tshwm sim nyob rau hauv synthesis theem?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
S theem , los yog synthesis , yog theem ntawm lub voj voog ntawm tes thaum DNA ntim rau hauv chromosomes replicated. Qhov kev tshwm sim no yog ib qho tseem ceeb ntawm lub voj voog ntawm tes vim tias kev rov ua dua tso cai rau txhua lub cell tsim los ntawm kev faib cell kom muaj tib yam caj ces tsim.
Yog li ntawd, dab tsi tshwm sim hauv S theem ntawm interphase?
Cov S theem ntawm ib lub voj voog ntawm tes tshwm sim thaum 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 ib lub xovtooj yog ob npaug ua ntej nws nkag mus rau mitosis lossis meiosis, cia kom muaj DNA txaus los faib rau hauv cov menyuam ntxhais.
Ib tug kuj yuav nug, dab tsi yog 3 theem ntawm interphase thiab dab tsi tshwm sim hauv txhua? Lub voj voog ntawm tes muaj peb theem uas yuav tsum tshwm sim ua ntej mitosis, lossis cell faib, tshwm sim . Cov no peb theem yog collectively hu ua interphase . Lawv yog G1, S, thiab G2. G sawv rau qhov sib txawv thiab S sawv rau kev sib txuas.
Hauv qhov no, yuav ua li cas hauv M theem?
Cell faib tshwm sim thaum lub sij hawm M theem , uas muaj nuclear division (mitosis) ua raws li cytoplasmic division (cytokinesis). Lub DNA yog replicated nyob rau hauv lub dhau los S theem ; ob daim ntawv luam ntawm txhua tus chromosome replicated (hu ua viv ncaus chromatids) tseem txuas ua ke los ntawm cohesins.
Nyob rau theem twg DNA synthesis tshwm sim?
DNA synthesis tshwm sim Thaum lub sij hawm interphase, lub sij hawm ntawm kev loj hlob, kev loj hlob, thiab ib txwm ua hauj lwm nyob rau hauv nruab nrab ntawm mitosis. Interphase tau muab faib ua peb ntu: G1 (Gap 1), S ( synthesis ), and G2 (Gap 2).
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