If a man with type AB blood and a woman with type O blood were to have children, what is the probability that a child would have the blood type O? * 100%
50%
25%
0%
which one^

0%

Explanation:

Let's use a Punnett square to solve this problem.

      A    B

O  AO  BO

O  AO  BO

The Punnett square shows that 50% of their children will have the AO genotype and 50% will have the BO genotype. Neither of these genotypes give the child type O blood, so it is impossible for the child to have type O blood. The child would need two O alleles.