Jack has type O blood and his mother has type A blood. His father could have any of the following blood types EXCEPT

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Quizplus · Accepted Answer

Since Jack has type O blood, he must have inherited one O allele from each parent. His mother, having type A blood, could either be genotype AO or AA. Since Jack has type O blood, his mother must have passed an O allele, indicating she is AO. For Jack to have type O blood, his father could not have provided an A or B allele, which eliminates the possibility of the father having AB blood, as individuals with AB blood can only pass on A or B alleles, not O.

Jack Has Type O Blood and His Mother Has Type