Mom and Dad both have type A blood.Their first child has type O blood.What does this tell us about Mom and Dad?
A)One of them must have an O gene.
B)Both of them must have an O gene.
C)One of them must be heterozygous type A.
D)Both of them must be homozygous type A.

Question

Quizplus · Accepted Answer

For a child to have type O blood, they must inherit an O gene from each parent. Therefore, both parents must carry an O gene, making them heterozygous (AO).

Mom and Dad Both Have Type a Blood