Vim li cas gametes muaj tus lej haploid ntawm chromosomes?
Vim li cas gametes muaj tus lej haploid ntawm chromosomes?

Video: Vim li cas gametes muaj tus lej haploid ntawm chromosomes?

Video: Vim li cas gametes muaj tus lej haploid ntawm chromosomes?
Video: Npaum Li Cas - David Yang (Prod. By Keeneng Vang) 2024, Kaum ib hlis
Anonim

Teb: Vim gametes yog qe thiab phev, uas sib sau ua ib lub zygote. Yog ob leeg ua tau diploid , lub zygote muaj obx ua tus lej ntawm qhov qub chromosomes . Yog li ntawd, nyob rau hauv thiaj li yuav tsim gametes , kab mob nyob rau hauv meiosis (los yog txo kev faib) los tsim cov haploid hlwb.

Ib yam li ntawd, koj tuaj yeem nug, vim li cas gametes muaj ib nrab ntawm cov chromosomes?

Gametes yog cov noob qes, xws li phev thiab qe. Raws li gametes raug tsim, cov tus naj npawb ntawm chromosomes yuav tsum tau txo los ntawm ib nrab . Vim li cas? Lub zygote yuav tsum muaj cov ntaub ntawv caj ces los ntawm leej niam thiab leej txiv, yog li ntawd gametes yuav tsum muaj ib nrab ntawm chromosomes pom nyob rau hauv ib txwm lub cev hlwb.

Tom qab ntawd, cov lus nug yog, vim li cas tsuas muaj 23 chromosomes hauv gametes? Vim txhua tus chromosome muaj ib khub, cov hlwb no hu ua "diploid" hlwb. Ntawm qhov tod tes, tib neeg phev thiab qe qe muaj tsuas yog 23 chromosomes , los yog ib nrab chromosomes ntawm diploid cell. Yog li, lawv hu ua "haploid" hlwb.

Yog li ntawd, pes tsawg chromosomes gametes muaj?

23 chromosome

Puas yog gametes ib txwm haploid?

Gametes yog ib txwm haploid . Gametes yuav tsum yog haploid txhawm rau tswj hwm tus lej chromosome ntawm hom. Meiosis yog txo qhov kev faib tawm uas tshwm sim hauv cov kab mob xwb gametes yog tsim nrog ib nrab ntawm tus lej chromosome rau ntawm niam txiv cell.

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