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

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4.Principles of Inheritance and Variation

normal

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

epistatic

supplementary

hypostatic

codominant

(AIIMS-2007)

Solution

When one gene masks the effect or activity of another gene which does not lie on the same locus, it is called epistasis. Epistasis refers to non- allelic interactions. Like coat colour in mice is controlled by epistatic gene. When coloured $(CCaa)$ mouse is crossed with albino $(ccAA)$, agouti mice $(ccAa)$ appeared in $F_1$ generation. Agouti, coloured and albino mice are obtained in $9 : 3 : 4$ ratio in $F_2$ generation.

Standard 12

Biology