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What is epistasis?

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What is epistasis?

(a) Type of linkage

(b) Masking or modifying gene effect

(c) Upper portion of a chromosome

(d) Group of genes

The question was asked in a job interview.

This interesting question is from Gene Interaction topic in section Genetics of Life Sciences

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Correct answer is (b) Masking or modifying gene effect

To explain: It is a non-allelic suppression which involves two pairs of alleles. It can suppress both dominant or recessive alleles.

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