Blood group of mother and child are B and AB | vedclass

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Question

(A) The mother has blood group $B$,which means her genotype can be $I^B I^B$ or $I^B i$.The child has blood group $AB$,meaning the genotype is $I^A I^

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$A$ and $AB$

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(A) The mother has blood group $B$,which means her genotype can be $I^B I^B$ or $I^B i$.The child has blood group $AB$,meaning the genotype is $I^A I^B$.Since the child must inherit one allele from each parent,the child must have received the $I^A$ allele from the father.If the mother is $I^B I^B$ or $I^B i$,she contributes the $I^B$ allele to the child.Therefore,the father must possess the $I^A$ allele to pass it to the child.Possible genotypes for the father that contain the $I^A$ allele are $I^A I^A$,$I^A i$ (Blood group $A$),or $I^A I^B$ (Blood group $AB$).Thus,the father can have blood group $A$ or $AB$.

Blood group of mother and child are $B$ and $AB$ respectively. The possible blood group of father would be .........

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