Cov plaub hau xim dab tsi yog qhov tseem ceeb dua?
Cov plaub hau xim dab tsi yog qhov tseem ceeb dua?

Video: Cov plaub hau xim dab tsi yog qhov tseem ceeb dua?

Video: Cov plaub hau xim dab tsi yog qhov tseem ceeb dua?
Video: Nkauj tawm tshiab _QHov twg los tau _ by Xim vaj & Xeeb vwj & xis nus vaj _ (2020 - 2021 ) 2024, Kaum ib hlis
Anonim

Nws hloov tawm tias cov plaub hau xim av yog qhov tseem ceeb. Qhov ntawd txhais tau hais tias txawm tias tsuas yog ib qho ntawm koj ob qho alleles yog rau cov plaub hau xim av, koj cov plaub hau yuav xim av. Cov daj ntseg allele yog recessive, thiab tau npog.

Ib yam li ntawd, cov plaub hau xim dab tsi yog qhov tseem ceeb thiab tsis zoo?

Raws li ib txoj kev xav, tsawg kawg yog ob lub noob caj noob ces tswj tib neeg cov plaub hau xim. Ib phenotype ( xim av / pojniam plaub hau daj ) muaj ib tug dominant xim av allele thiab recessive daj ntseg allele. Ib tug neeg nrog a xim av allele yuav muaj plaub hau xim av ; tus neeg tsis muaj xim av alleles yuav daj ntseg.

Tsis tas li ntawd, cov plaub hau dab tsi yog qhov tseem ceeb dua? Yog li ntawd ib tug dub plaub hau niam txiv nqa ib tug rov ua dua gene rau cov plaub hau daj tuaj yeem muaj peev xwm muaj cov menyuam daj yog tias cov noob tau nthuav tawm thiab sib xyaw nrog cov noob daj los ntawm lwm tus niam txiv. Raws li rau cov plaub hau liab, uas yog ib zaug xav txog rov ua dua , tam sim no nws ntseeg tau tias yog dominant dua blond.

Raws li, cov plaub hau xim dab tsi yog qhov tseem ceeb tshaj liab lossis xim daj?

Cov plaub hau liab Nws tsis yog ib tug recessive gene (xws li pojniam plaub hau daj yog), tab sis yog qhov tsis tiav tseem ceeb ” Hauv ntiaj teb cov noob, muaj tseem ceeb genes, uas coj dhau ib qho gene recessive (xim av, dub), recessive genes ( pojniam plaub hau daj ), uas yuav raug coj los ntawm ib qho twg tseem ceeb gene, los yog tsis tiav dominent genes ( liab ).

Cov plaub hau xim dab tsi yog cov xim dub lossis xim daj?

Ib qho kev piav qhia yog li ntawd tsaus ntuj noob muaj ntau dua tseem ceeb , thaum koj muab lawv piv rau cov uas muaj lub luag haujlwm rau lub teeb xim . Vim li no, thaum ib tug niam txiv nqa lub dominant tsaus xim gene, thiab lwm yam muaj qhov recessive pojniam plaub hau daj gene, qhov muaj feem ntawm lawv cov menyuam muaj cov plaub hau tsaus yog siab heev.

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