Question

The gene interaction when one gene masks the effect of the other is called as

• A. Complementary gene action
• B. Supplementary gene action
• C. Duplicate gene action
• D. Epistasis

Answer 1

The correct option is D Epistasis

A. Complementary gene action: These are two pairs of non allelic dominant genes, which interact to produce only one phenotypic trait but neither of them produces the trait in the absence of other. The presence of both of the genes is necessary for the development of dominant character.

B. Supplementary gene action: These are two independent dominant gene pairs which are non allelic and interact in such a way that one dominant gene produces its effect irrespective of the presence of or absence of the other. The second dominant gene requires the presence of other for its expressions and this second gene is supplementary gene.

C. Duplicate gene: These are the two pairs of genes, which determine same or nearly same phenotype.

D. Epistasis is the interaction between non allelic genes in which one gene masks, inhibit or suppresses the expression of other.

So, the correct answer is 'Epistasis'.