If a child has blood group O and the father h | vedclass

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Question

(A) The child has blood group $O$,which means the genotype is $ii$. One $i$ allele is inherited from the father and one $i$ allele is inherited from t

Vedclass · Accepted Answer

$AB$

Vedclass · Answer

(A) The child has blood group $O$,which means the genotype is $ii$. One $i$ allele is inherited from the father and one $i$ allele is inherited from the mother. The father has blood group $B$,so his genotype must be $I^B i$ to provide an $i$ allele to the child. Since the child must receive an $i$ allele from the mother,the mother's genotype must contain at least one $i$ allele. Possible genotypes for the mother are $I^A i$ (blood group $A$),$I^B i$ (blood group $B$),or $ii$ (blood group $O$). Blood group $AB$ has the genotype $I^A I^B$,which does not contain an $i$ allele. Therefore,a mother with blood group $AB$ cannot produce a child with blood group $O$ when the father is blood group $B$.

If a child has blood group $O$ and the father has blood group $B$,which of the following blood groups cannot be the mother's?

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