Question

The relationship of the I and H genes affects the expression of the ABO blood type in the following ways: genotype HH or Hh, AB produces blood type AB while genotype hh, AB produces blood type O. This is an example of _____.

Answer 1

Here are the options to complete the question

A) complete dominance

B) codominance

C) incomplete dominance

D) epistasis

The ANSWER IS SURELY D)

D) epistasis

Step-by-step explanation:

Epistasis is the phenomenon wherein the effect of one gene (locus) is dependent on the presence of one or more 'modifier genes', i.e. the genetic background

Epistatic genes are often termed inhibiting genes due to its hypostatic effect on other genes.