Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

Epistasis is interaction between two or more genes to control a single phenotype. Dominant epistasis also called masking has a ratio $12:3:1$ in the ${\mathrm{F}}_2$ phenotype. Supplementary genes which is recessive epistasis has ratio $9:3:4$. Complementary gene where both dominant alleles are needed for phenotype has ratio 9:7. Inhibitor gene where one gene inhibits the expression of another gene has ratio $13:3$ in ${\mathrm{F}}_2$ progeny.