Qhov txawv ntawm dominance thiab Codominance yog dab tsi?
Qhov txawv ntawm dominance thiab Codominance yog dab tsi?

Video: Qhov txawv ntawm dominance thiab Codominance yog dab tsi?

Video: Qhov txawv ntawm dominance thiab Codominance yog dab tsi?
Video: Qhov Sib Txawv Ntawm Khetos Qhov Kev Ua Neej thiab Cov Tib Neeg Qias Vuab Tsuab Qhov Kev Ua Neeg 2024, Kaum ib hlis
Anonim

Hauv ob qho tib si codominance thiab tsis tiav kev tswj hwm , ob leeg alleles rau ib tug zoo tseem ceeb . Hauv codominance ib tug neeg heterozygous nthuav qhia ob qho tib si ib txhij yam tsis muaj kev sib xyaw. Ua tsis tiav kev tswj hwm tus neeg heterozygous sib xyaw ob qhov zoo.

Yog li ntawd, Codominance yog dab tsi?

Codominance yog ib qho kev sib raug zoo ntawm ob lub gene. Cov tib neeg tau txais ib qho qauv ntawm cov noob, hu ua allele, los ntawm txhua tus niam txiv. Yog tias cov alleles txawv, qhov tseem ceeb ntawm allele feem ntau yuav qhia, thaum cov nyhuv ntawm lwm cov allele, hu ua recessive, yog npog.

Tsis tas li ntawd, dab tsi yog qhov tsis tiav dominance? Tsis tiav dominance yog ib daim ntawv ntawm cov qub txeeg qub teg nyob rau hauv uas ib tug allele rau ib tug tshwj xeeb zoo yog tsis kiag li qhia tag nrho nws cov khub allele. Qhov no ua rau muaj qhov thib peb phenotype uas qhia lub cev zoo yog kev sib txuas ntawm cov phenotypes ntawm ob qho tag nrho.

Yog li ntawd, qhov piv txwv ntawm kev sib koom ua ke yog dab tsi?

Piv txwv ntawm codominance suav nrog tus neeg muaj ntshav hom AB, uas txhais tau hais tias ob qho tib si A allele thiab B allele tau qhia sib npaug. Lwm piv txwv yog roan fur nyob rau hauv nyuj, nyob rau hauv uas cov plaub hau dawb thiab liab qhia sib npaug.

Yuav ua li cas koj thiaj paub qhov twg allele yog dominant?

Thaum muaj xwm txheej tseem ceeb , ib leeg xwb allele yuav tsum tau saib xyuas qhov zoo. A tseem ceeb allele yuav npog ib tug recessive allele , yog muaj. A tseem ceeb allele yog denoted los ntawm ib tsab ntawv loj (A piv rau a). Vim txhua tus niam txiv muab ib qho allele , qhov ua tau ua ke yog: AA, Aa, thiab aa.

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