Answer :
9:7 IS the F2 phenotypic ratios represents duplicate recessive epistasis.
If one of the two loci's recessive alleles can block the expression of the two loci's dominant alleles, this is known as duplicate recessive epistasis. Complementary epistasis is another name for this. Color of the flowers on sweet pea plants is an illustration of duplicate recessive epistasis.
He uses the gene for -crystallin as an illustration in phenotypic ratios , which in ducks produces both an enzyme ( argininosuccinate lyase) and a protein that forms the lens of the eye. In other vertebrates, however, this gene appears to have duplicated, with each gene encoding just one of these products.
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