Puas yog fertilization ib feem ntawm meiosis?
Puas yog fertilization ib feem ntawm meiosis?

Video: Puas yog fertilization ib feem ntawm meiosis?

Video: Puas yog fertilization ib feem ntawm meiosis?
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Anonim

Meiosis yog kev faib txo. Yog li meiosis tsim gametes (sex hlwb), txhua tus nrog ib nrab ntawm tag nrho cov chromosomes. Tom qab ntawd lub qe cell thiab cov phev cell sib sau ua ke ( fertilization ), tsim cov zygote nrog tag nrho cov chromosomes.

Yog lawm, yog fertilization meiosis los yog mitosis?

Mitosis ua rau yuav luag tag nrho cov hlwb hauv lub cev. Ib hom kev faib cell sib txawv hu ua meiosis ua rau cov phev thiab qe. Thaum fertilization cov phev thiab qe sib sau ua ib lub cell hu ua zygote uas muaj chromosomes los ntawm cov phev thiab qe.

Ib yam li ntawd, uas yog ib feem ntawm meiosis tab sis tsis yog mitosis? Cov xwm txheej uas tshwm sim hauv meiosis tab sis tsis yog mitosis suav nrog homologous chromosomes ua ke, hla dhau, thiab tetrads nyob rau hauv daim ntawv ntawm metaphase.

Cia li xav txog qhov no, nyob rau theem twg ntawm meiosis fertilization tshwm sim?

Tom qab ovulation , txhua oocyte txuas ntxiv mus metaphase ntawm meiosis II . Meiosis II tsuas yog ua kom tiav yog tias fertilization tshwm sim, ua rau fertilized mature ovum thiab ob lub cev polar. Yog li ntawd, nyob rau hauv luv luv, lub qe yog daig nyob rau hauv metaphase II mus rau fertilization.

4 kauj ruam ntawm fertilization yog dab tsi?

Cov theem ntawm fertilization tuaj yeem muab faib ua plaub Cov txheej txheem: 1) phev npaj, 2) phev-qe lees paub thiab khi, 3) phev-qe fusion thiab 4 ) fusion ntawm phev thiab qe pronuclei thiab ua kom lub zygote.

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