Tus naj npawb ntawm cov hlwb tsim hauv meiosis yog dab tsi?
Tus naj npawb ntawm cov hlwb tsim hauv meiosis yog dab tsi?

Video: Tus naj npawb ntawm cov hlwb tsim hauv meiosis yog dab tsi?

Video: Tus naj npawb ntawm cov hlwb tsim hauv meiosis yog dab tsi?
Video: Lis Yaj Pov - Ntawm Tus Neeg Muaj Poj Niam : full version 2024, Kaum ib hlis
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plaub tus ntxhais

Ib yam li ntawd, nws tau nug, hom cell twg tsim thaum kawg ntawm meiosis?

Nyob rau hauv sib piv rau mitotic division, uas yields ob tug zoo tib yam diploid ntxhais hlwb , cov kawg tshwm sim ntawm meiosis yog tus ntxhais haploid hlwb nrog chromosomal sib xyaw ua ke sib txawv ntawm cov uas muaj nyob hauv niam txiv. Hauv cov phev hlwb , plaub haploid gametes yog ua.

Dab tsi ntawm cov hlwb tsim hauv mitosis? Mitosis tsim txhua yam tsiaj thiab nroj tsuag hlwb , cov ntaub so ntswg, thiab cov kabmob tshwj tsis yog gametes (cov qe thiab cov phev). Txij li thaum mitosis tsim genetic clones ntawm niam txiv cell thaum nws faib, txhua yam tsiaj thiab nroj tsuag hlwb uas loj hlob los ntawm lub qe fertilized (zygote) yog ntau dua los yog tsawg dua genetic zoo tib yam.

Ib yam li ntawd, koj tuaj yeem nug, pes tsawg lub hlwb ua meiosis kawg?

(Saib daim duab hauv qab no, qhov twg meiosis Kuv pib nrog diploid (2n = 4) cell thiab xaus nrog ob haploid (n = 2) hlwb .) Hauv tib neeg (2n = 46), leej twg muaj 23 khub ntawm chromosomes, tus naj npawb ntawm chromosomes raug txo los ntawm ib nrab ntawm kawg ntawm meiosis kuv (n = 23).

Yuav ua li cas gametes tsim nyob rau hauv meiosis?

Meiosis tsim haploid gametes (ova lossis phev) uas muaj ib pawg ntawm 23 chromosomes. Thaum ob gametes (ib qe thiab phev) fuse, qhov tshwm sim zygote yog ib zaug ntxiv diploid, nrog leej niam thiab leej txiv txhua tus pab txhawb 23 chromosomes.

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