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  4. Gene which suppresses other gene’s activity but does not lie on the same locus is called as

Q. Gene which suppresses other gene’s activity but does not lie on the same locus is called as

 2370  190 AIIMSAIIMS 2000 Report Error

Solution:

The phenomenon by which a gene suppresses the phenotypic expression of a nonallelic gene is called epistasis. Gene or locus which is suppressed by the presence of nonallelic gene is termed as hypostatic gene. The alleles which do not show dominant recessive relationship and are able to express themselves independently when present together are called codominant alleles. Supplementary genes are a pair of nonallelic 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 modify the effect of the former to produce a new trait.