Question

When one gene pair hides the effect of the other unit, the phenomenon is referred to as 

Answer 1

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Domiance is the phenomenon When one gene pair hides effect other unit.

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Answer 2

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When one gene pair hides the effect of the other unit, the phenomenon is referred to as  Epistasis.

It is different from Dominance in which one allele suppresses expression of another allele ie it concerns expression at a single locus or by a single gene. 

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