Which of the following explains how someone can have the gen

Which of the following explains how someone can have the genotype for a blood type of AB, but their blood type appears to be type O?

A. Codominance

B. Incomplete dominance

C. Epistasis

D. Pleiotropy

Solution

The answer is C. Epistasis.

In ineritance. the A and B genes are codominant and the O gene is recessive.