Question

The ratio in case of duplicate dominant epistasis is

• A. 15:1
• B. 9:3:4
• C. 13:3
• D. None of the above

Answer 1

The correct option is A 15:1

If a dominant allele of both gene loci produces the same phenotype without cumulative effect, i.e., independently the ratio will be 15:1. Complete dominance at both gene pairs, but either gene when dominant epistatic to the other. Thus the correct answer is option A.