Question

Two non-allelic genes produce the new phenotype when present together but fail to do so independently then it is called as

• A. Epistasis
• B. Polygene
• C. Non complementary gene
• D. Complementary gene

Answer 1

The correct option is D Complementary gene

Two non-allelic genes produce the new phenotype when present together but fail to do so independently then it is called complementary gene. The complementary gene is a interaction of two dominant non inter-allelic gene in which each gene have its own effect but when come together to interact, a new trait is developed and the Mendelian ratio 9:3:3:1 is changed to 9:7 due to complementation of both genes.