In the ABO blood type system,
A) A, B, and O are codominant.
B) A, B, and O are incompletely dominant.
C) A and B are codominant.
D) O is incompletely dominant to A and B.
E) A is dominant to B, and B is dominant to O.

Question

Quizplus · Accepted Answer

In the ABO blood type system, A and B are codominant, meaning both alleles are expressed equally in individuals who inherit both alleles. The O allele is recessive to both A and B, meaning an individual needs to inherit two copies of the O allele to have type O blood.

In the ABO Blood Type System