If a child belongs to blood type O,he or she could NOT have been produced by which set of parents?
A) type A mother and type B father
B) type A mother and type O father
C) type AB mother and type O father
D) type O mother and type O father
E) type AB mother and type B father

Question

Quizplus · Accepted Answer

A child with blood type O can only inherit two O alleles from their parents. As type A and type B both have an A or B allele, they cannot pass down two O alleles. Therefore, choices A, B, and E are possible sets of parents for a type O child. However, a type AB mother would have AB alleles and could not pass down a necessary O allele to create a type O child.

If a Child Belongs to Blood Type O,he or She