If a woman of blood type A has a child of blood type O, the father may belong to ____.
A)blood types A, AB, or O, but not B
B)blood type O only
C)blood types A, B, or O, but not AB
D)any blood type other than type A
E)blood type A only

Question

Quizplus · Accepted Answer

Blood type is determined by alleles, with A and B being dominant, and O being recessive. A child with type O must inherit an O allele from each parent. Therefore, the father can be of type A, B, or O (each can carry an O allele), but not AB (as AB individuals do not carry the O allele).

If a Woman of Blood Type a Has a Child