Answer:B) EPISTASIS
Explanation: EPISTASIS is a term used in Genetics to define the Masking of a pair of Gene by another Gene pair,this Epistatic Gene are usually called INHIBITING GENES because of the effect they have on other Genes which leads to the suppression of the effects of others.
An example of epistasis is seen in the pigmentation which occurs Mice. The wild-type coat color, agouti (AA), is dominant to solid-colored fur (aa). But in this case another Gene called (C) is needed for Production of pigment.
