Question

Gene which suppresses other gene's activity but does not lie on the same locus is called a

(a) epistatic (b) supplementary (c) hypostatic (d) codominant.

Answer 1

Correct option (a) epistatic

Explanation:

The phenomenon by which a gene suppresscs the phenotypic expression of a nonallelic gene is called epistasis. The ratio for the epistatic gene is 12 : 3 : 1 in F₂ generation. The alleles which do not show the dominant-recessive relationship and are able to express themselves independently when present together are called codominant alleles. Supplementary senes are a pair of non-allelic genes, one of which produces its effect independently in the dominant state while the dominant allele of the second gene is without any independent effect but is able to notify the effect of the forme to produce a new trait.