Cov txheej txheem:
Video: Cov theem ntawm meiosis yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txij li thaum kev faib cell tshwm sim ob zaug thaum lub sij hawm meiosis, ib qho pib cell tuaj yeem tsim plaub gametes (qe lossis phev). Hauv txhua qhov kev faib tawm, cov cell mus dhau plaub theem: prophase , metaphase , kev anaphase , thiab telophase.
Kuj tseem paub yog, dab tsi yog 8 theem ntawm meiosis hauv kev txiav txim?
Cov ntsiab lus hauv cov teeb no (8)
- Prophase I. Cov chromosomes condense, thiab lub hnab ntawv nuclear tawg.
- Metaphase I. Pairs ntawm homologous chromosomes txav mus rau txoj kab nruab nrab ntawm lub cell.
- Anaphase I.
- Telophase I thiab Cytokinesis.
- Prophase II.
- Metaphase II.
- Anaphase II.
- Telophase II thiab Cytokinesis.
Dab tsi tshwm sim hauv meiosis kuv? Hauv meiosis I , chromosomes nyob rau hauv ib tug diploid cell resegregate, tsim plaub haploid ntxhais hlwb. Nws yog kauj ruam hauv no meiosis uas ua rau muaj ntau haiv neeg. DNA replication precedes pib ntawm meiosis I . Thaum lub sij hawm prophase I, homologous chromosomes khub thiab tsim synapses, ib kauj ruam tshwj xeeb rau meiosis.
Hauv qhov no, 10 theem ntawm meiosis yog dab tsi?
Cov ntsiab lus hauv cov teeb no (10)
- Interphase. Cells nyob rau hauv interphase nqa tawm ntau yam txheej txheem, xws li replicating DNA thiab chromosomes thiab synthesizing proteins.
- Prophase I.
- Metaphase I.
- Anaphase I.
- Telophase I.
- Prophase II.
- Metaphase II.
- Anaphase II.
Cov theem meiosis 1 thiab 2 yog dab tsi?
Ob leeg Meiosis I thiab II muaj tib tus lej thiab kev npaj ntawm theem : prophase, metaphase, anaphase, thiab telophase. Homologous khub ntawm cell muaj nyob rau hauv meiosis I thiab cais ua chromosomes ua ntej meiosis II . Hauv meiosis II , cov chromosomes no tau sib cais ntxiv mus rau tus muam chromatids.
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