Question

Genes that are similar in phenotypic effect when present separately, but together interact to produce a different trait and ratio is 9 : 7 in F${}_2$ generation. Such genes are known as

• A. Supplementary genes
• B. Complementary genes
• C. Hypostatic genes
• D. Epistatic genes

Answer 1

Answer: (B)

Complementary genes

The complementary gene is an interaction of two dominant non inter allelic gene in which each gene have its own effect but when they come together to interact then a new trait is developed and the Mendelian ratio 9:3:3:1 is changed to 9:7 due to complementation of both genes.