The ABO Blood Type System Consists of ______ Alleles

Question

The ABO blood type system consists of ______ alleles.
A) 6
B) 4
C) 3
D) 2
E) 5

Accepted Answer

The ABO blood type system has three alleles: A, B, and O. The A and B alleles are codominant, while the O allele is recessive. Therefore, individuals can have one of six possible genotypes: AA, AO, BB, BO, AB, or OO.