Video: Qhov txawv ntawm meiosis 1 thiab meiosis 2 quizlet yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv meiosis I , homologous chromosomes cais tshwm sim hauv a txo ploidy. Txhua tus ntxhais cell muaj xwb 1 teeb ntawm chromosomes. Meiosis II , cais tus muam chromatids sib nrug.
Cov lus nug tseem ceeb yog, qhov sib txawv loj ntawm meiosis 1 thiab meiosis 2 yog dab tsi?
Hauv meiosis Kuv, homologous chromosomes cais, thaum nyob rau hauv meiosis II , tus muam chromatids cais. Meiosis II tsim 4 haploid ntxhais hlwb, whereas meiosis Kuv tsim 2 diploid ntxhais cell. Genetic recombination (hla dhau) tsuas yog tshwm sim hauv meiosis Kuv.
Tom qab ntawd, lo lus nug yog, qhov zoo sib xws ntawm meiosis 1 thiab meiosis 2 yog dab tsi? Ob leeg Meiosis 1 thiab 2 muaj tib theem: Prophase, Metaphase, Anaphase thiab Telophase. Ib qho txawv yog qhov ntawd Meiosis 1 pib nrog ib tug diploid cell thiab Meiosis 2 pib nrog 2 cov hlwb haploid, txhua tus muaj ib khub homologous. Meiosis 1 tshwm sim hauv 2 cov ntxhais thiab Meiosis 2 ua 4.
Kuj tseem paub, yuav ua li cas tshwm sim hauv meiosis 2 tab sis tsis yog meiosis 1?
Meiosis yog qhov tsim ntawm plaub cov noob caj noob ces haploid ntxhais hlwb los ntawm ib diploid niam txiv cell. Hauv meiosis II , cov chromosomes yog sib cais ntxiv mus rau tus muam chromatids. Meiosis Kuv suav nrog kev hla lossis rov ua dua ntawm cov khoom siv caj ces ntawm chromosome khub, thaum meiosis II tsis.
Ib qho xwm txheej hauv meiosis II yog dab tsi?
Thaum meiosis II , tus muam chromatids nyob rau hauv lub ob cov menyuam ntxhais cais, tsim plaub haploid gametes tshiab. Cov mechanics ntawm meiosis II zoo ib yam li mob mitosis , tsuas yog hais tias txhua qhov kev faib cell muaj xwb ib teeb ntawm homologous chromosomes.
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