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Video: Dab tsi tshwm sim hauv meiosis Down syndrome?
2024 Tus sau: Edward Hancock | [email protected]. Kawg hloov kho: 2023-12-16 01:32
Down syndrome yog feem ntau tshwm sim los ntawm qhov yuam kev hauv kev faib cell hu ua "nondisjunction." Nondisjunction ua rau lub embryo nrog peb daim ntawv luam ntawm chromosome 21 es tsis txhob ntawm ob li niaj zaus. Ua ntej los yog thaum xeeb tub, ib khub ntawm 21st chromosomes nyob rau hauv cov phev los yog lub qe tsis cais.
Xav txog qhov no, meiosis cuam tshuam li cas rau Down syndrome?
Thaum lub sij hawm mitosis thiab meiosis , muaj ib theem uas txhua tus khub chromosome hauv ib lub xovtooj sib cais, kom txhua lub xovtooj tshiab tuaj yeem tau txais ib daim qauv ntawm txhua tus chromosome. Nrog Down syndrome , ntau hom kev sib cais ntawm chromosome tsis sib xws ua rau tus neeg muaj ib daim ntawv luam ntxiv (lossis ib nrab daim ntawv) ntawm chromosome 21.
Tom qab ntawd, lo lus nug yog, dab tsi ntawm meiosis yog lub luag haujlwm rau Down syndrome? Down syndrome tshwm sim thaum lub nondisjunction tshwm sim nrog Chromosome 21. Meiosis yog ib hom tshwj xeeb ntawm kev faib cell siv los tsim peb cov phev thiab qe qe.
Raws li txoj cai, qhov txawv txav chromosomal qhov twg yog qhov ua rau Down syndrome?
Trisomy 21. Txog 95 feem pua ntawm lub sijhawm, Down syndrome yog ua rau los ntawm trisomy 21 - tus neeg muaj peb daim ntawv luam ntawm chromosome 21, tsis yog ob daim ntawv ib txwm, hauv txhua lub hlwb. Qhov no yog ua rau los ntawm txawv txav cell faib thaum lub sij hawm kev loj hlob ntawm cov phev cell los yog lub qe cell.
Yuav ua li cas qee qhov teeb meem ntawm Down syndrome yuav kov yeej?
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- Kev hais lus-lus tuaj yeem pab cov menyuam yaus uas muaj tus mob Down tuaj yeem txhim kho lawv cov kev sib txuas lus thiab siv lus zoo dua.
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