Puas yog Down syndrome tshwm sim los ntawm kev hloov pauv rau DNA?
Puas yog Down syndrome tshwm sim los ntawm kev hloov pauv rau DNA?

Video: Puas yog Down syndrome tshwm sim los ntawm kev hloov pauv rau DNA?

Video: Puas yog Down syndrome tshwm sim los ntawm kev hloov pauv rau DNA?
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Down syndrome yog chromosomal (txog rau koj DNA ) mob nyob rau hauv uas atypical cell faib ua rau ib feem ntxiv ntawm chromosome 21 kom muaj nyob rau hauv ib co los yog tag nrho ntawm ib tug neeg lub hlwb.

Ib yam li ntawd, koj tuaj yeem nug, puas yog Down Syndrome yog DNA hloov los yog nws tau txais txiaj ntsig?

Keeb kwm Qauv Feem ntau ntawm Down syndrome tsis yog tau qub txeeg qub teg . Thaum tus mob tshwm sim los ntawm trisomy 21, chromosomal abnormality tshwm sim raws li ib qho kev tshwm sim random thaum lub sij hawm tsim cov qe menyuam hauv niam txiv. Qhov txawv txav feem ntau tshwm sim hauv qe qe, tab sis qee zaus nws tshwm sim hauv cov phev hlwb.

Puas yog Down syndrome tshwm sim los ntawm kev ntxig? Down syndrome Kuj tseem tuaj yeem tshwm sim thaum ib feem ntawm chromosome 21 txuas nrog (txuas mus) mus rau lwm tus chromosome, ua ntej lossis thaum xeeb. Cov menyuam yaus no muaj ob daim qauv ntawm chromosome 21 ib txwm, tab sis lawv kuj muaj cov khoom siv caj ces ntxiv los ntawm chromosome 21 txuas rau lwm chromosome.

Tom qab ntawd, lo lus nug yog, cov txheej txheem twg tuaj yeem ua rau Trisomy 21?

Qhov feem ntau hom ntawm Down syndrome hu ua trisomy 21 . Qhov no yog ib qho mob uas tib neeg muaj 47 chromosomes nyob rau hauv txhua lub cell es tsis txhob ntawm 46. Ib qho yuam kev hauv cell division hu ua nondisjunction ua rau trisomy 21 . Qhov yuam kev no tso cov phev los yog qe qe nrog ib daim ntawv luam ntxiv chromosome 21 ua ntej los yog thaum conception.

Dab tsi ntawm cov kab mob caj ces ua rau Down syndrome haum rau?

Hom ntawm Down syndrome Cov neeg feem coob nrog Down syndrome (li 95 feem pua) muaj trisomy 21. Nws yog ib yam mob tshwm sim ntawm conception thiab tsis yog hereditary. mosaic Down syndrome - qhov twg muaj chromosome 21 ntxiv hauv qee qhov (tab sis tsis yog tag nrho) ntawm tus cell, thaum tus so ntawm tus hlwb muaj tus txheem caj ces muaj pes tsawg leeg.

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