A man with AB blood type marries a heterozygous woman with blood type A.They have children.What percentage of their offspring would have blood type O? (Draw a Punnett square to help you figure this out. )

Question

Quizplus · Accepted Answer

Since the man has AB blood type, he can only pass on A or B alleles. The woman, being heterozygous for blood type A, has one A allele and one O allele. Therefore, none of their children can have blood type O because they will always receive either an A or a B allele from their father, making it impossible to inherit two O alleles, which is required for blood type O.

A Man with AB Blood Type Marries a Heterozygous Woman