Inheritance of ABO blood type in humans is an example of
A) incomplete dominance.
B) complete dominance of one allele over another.
C) a gene that is coded by only one allele.
D) epistasis.

Question

Quizplus · Accepted Answer

ABO blood type is an example of complete dominance of one allele over another. The A and B alleles are co-dominant, while the O allele is recessive to both A and B. When A and B are present together, they are both expressed and create the AB blood type. When O is present, it is only expressed when there are no A or B alleles present.

Inheritance of ABO Blood Type in Humans Is an Example