The 9 : 3 : 3 : 1 ratio is modified to 9 : 7 | vedclass

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(A) The $9 : 7$ ratio is a classic example of complementary gene interaction.In this interaction,two pairs of non-allelic genes interact to produce a

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Complementary gene

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(A) The $9 : 7$ ratio is a classic example of complementary gene interaction.In this interaction,two pairs of non-allelic genes interact to produce a single phenotypic trait.If either gene is present alone,it cannot express the trait; both dominant alleles must be present together to produce the phenotype.This results in a modification of the dihybrid $9 : 3 : 3 : 1$ ratio to $9 : 7$ in the $F_2$ generation.

The $9 : 3 : 3 : 1$ ratio is modified to $9 : 7$ ratio due to

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