Ploidy txhais li cas?
Ploidy txhais li cas?

Video: Ploidy txhais li cas?

Video: Ploidy txhais li cas?
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Ploidy yog ib lo lus los ntawm noob caj noob ces thiab cell biology. Nws yog siv los qhia tus naj npawb ntawm chromosome teev nyob rau hauv ib lub cell. Feem ntau eukaryotes muaj ib txheej (hu ua haploid) lossis ob pawg (hu ua diploid). Qee lwm yam kab mob yog polyploid, lawv muaj ntau tshaj ob pawg chromosomes.

Ib yam li ntawd, tib neeg nug, dab tsi yog ploidy ntawm cell?

Ploidy . Ploidy , nyob rau hauv genetics, tus naj npawb ntawm chromosomes tshwm sim nyob rau hauv lub nucleus ntawm a cell . Hauv ib txwm somatic (lub cev) hlwb , cov chromosomes muaj nyob rau hauv khub. Thaum lub sij hawm meiosis cell tsim gametes, lossis kab mob hlwb , txhua tus muaj ib nrab ntawm ib txwm lossis somatic tus lej ntawm chromosomes.

Kuj Paub, ploidy txiav txim siab li cas? Ploidy tuaj yeem soj ntsuam los ntawm tus lej chromosome lossis los ntawm kev ntws cytometry siv DNA index (DI), qhov sib piv ntawm fluorescence hauv leukemic blasts piv rau cov hlwb ib txwm muaj. Cov hlwb diploid ib txwm muaj 46 chromosomes thiab DI ntawm 1.0, cov hlwb hyperdiploid muaj txiaj ntsig ntau dua, thiab cov hlwb hypodiploid qis dua.

Tom qab ntawd, lo lus nug yog, lo lus ploidy hais txog dab tsi?

Ploidy hais txog Tus naj npawb ntawm cov teeb meem ntawm homologous chromosomes nyob rau hauv genome ntawm ib lub cell los yog ib yam kab mob. Txhua qhov teeb tsa raug xaiv los ntawm n. Raws li, ib pawg ntawm chromosomes, 1n, yog piav raws li monoploid. Lub xovtooj ntawm tes lossis cov kabmob uas muaj ob pawg ntawm homologous chromosomes, 2n, tau piav qhia tias yog diploid.

Puas yog ploidy haploid lossis diploid?

Tib neeg (tshwj tsis yog lawv cov gametes), feem ntau cov tsiaj thiab ntau cov nroj tsuag yog diploid . Peb sau luv diploid ua 2n. Ploidy yog ib lo lus hais txog tus lej ntawm cov chromosomes. Haploid kab mob/hlwb tsuas muaj ib pawg chromosomes, abbreviated li n.

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