The ABO blood system in humans is controlled by three distinguishable alleles.This is an example of what genetic principle?
A) Incomplete dominance
B) Partial dominance
C) Semi-dominance
D) Multiple alleles
E) Pleomorphism

Question

Quizplus · Accepted Answer

The presence of three distinguishable alleles controlling a single trait is an example of multiple alleles. In the ABO blood system, the three alleles are IA, IB, and i, with IA and IB being co-dominant and i being recessive.

The ABO Blood System in Humans Is Controlled by Three