Codominance yog thaum ob lub noob tsis qhia kev sib raug zoo ntawm kev sib raug zoo lossis tsis pom qhov nruab nrab, tab sis ob leeg qhia lawv tus kheej ib txhij. Qhov no tau tshaj tawm nyob rau hauv roan cim ntawm nyuj (piv txwv li thaj tsam ntawm 2 txawv xim ntawm daim tawv nqaij).
Thaum twg ob qho tib si tseem ceeb thiab thim rov qab muaj nyob?
Yog ob leeg ntawm alleles koj tau txais los ntawm koj niam koj txiv yog tib yam, lub genotype yog homozygous. Txawm li cas los xij, yog tias koj muaj ib qho tseem ceeb thiab ib qho kev ua tsis zoo, qhov genotype yog heterozygous.
Yuav ua li cas yog qhov tseem ceeb thiab qhov tsis zoo tau txais txiaj ntsig?
Txawm hais tias ib tus neeg cov noob tuaj yeem ua rau lub cev tshwj xeeb, cov noob ntawd tuaj yeem muaj nyob hauv ntau hom, lossis alleles. Ib qho allele rau txhua lub noob hauv ib lub cev yog tau txais los ntawm txhua tus ntawm cov kab mob ntawd niam txiv. … Alleles tsim phenotypes (los yog lub cev versions ntawm ib tug zoo) uas yog tus tseem ceeb los yog recessive.
Dab tsi yog qhov tseem ceeb thiab qhov tsis txaus ntseeg muaj qhov sib xws?
Thaum ib qho allele tseem ceeb, yam ntxwv nws txuas nrog yuav qhia rau tus neegThaum tus allele yog qhov tsis zoo, tus yam ntxwv nws txuas nrog tsis tshua muaj. qhia. Recessive traits xwb manifest thaum ob alleles recessive nyob rau hauv ib tug neeg.
YPuas yog BB dominant lossis recessive?
Ib yam kab mob uas muaj ob qho tseem ceeb alleles rau qhov zoo yog hais tias muaj homozygous dominant genotype. Siv qhov muag xim piv txwv, qhov genotype no yog sau BB. Ib kab mob nrog ib qho tseem ceeb allele thiab ib qho recessive allele yog hais tias muaj ib hom kab mob heterozygous. Hauv peb qhov piv txwv, qhov genotype no tau sau Bb.
