Blood types (A, B, and O) are controlled by
A)sex-linked genes.
B)linked genes.
C)incompletely dominant genes.
D)multiple alleles.
E)none of these.

Question

Quizplus · Accepted Answer

Blood types are controlled by multiple alleles. The ABO blood group system is controlled by three alleles: IA, IB, and i. IA and IB are co-dominant, while i is recessive. The combination of these alleles determines a person's blood type (A, B, AB, or O).

Blood Types (A, B, and O) Are Controlled by