If a child has blood type AB, the parents
A) must both have different blood types.
B) must have blood types A and B, but not blood type AB.
C) must both have blood type AB.
D) can have any blood type.
E) can have different blood types, but neither can have blood type O.

Question

Quizplus · Accepted Answer

A child with blood type AB must inherit an A allele from one parent and a B allele from the other. Therefore, neither parent can have blood type O, which lacks both A and B alleles.

If a Child Has Blood Type AB, the Parents