Question

A gene, which affects the character of another gene, not located on similar locus of the homologous chromosome is called as

• A. Duplicate gene
• B. Epistatic gene
• C. Complimentary gene
• D. Supplementary gene

Answer 1

Answer: (B)

Epistatic gene

In epistasis, one gene suppresses the expression of other gene present on the different locus of homologous chromosome. A gene that masks or suppresses the expression of another gene is called as epistatic gene and the gene that is suppressed or masked is called as hypostatic gene. In this type of interaction, the ratio is 12:3:1 as second gene will be expressed only if first gene have recessive alleles.

Thus, the correct answer is option B.