Suppose that a mutation in a coat color gene of a mouse alters an enzyme such that it produces a red pigment instead of the wild type,which is tan.This is a _______ mutation,which is most likely _______.
A) gain-of-function;dominant
B) gain-of-function;recessive
C) loss-of-function;dominant
D) loss-of-function;recessive
E) loss-of-function;intermediately dominant

Question

Quizplus · Accepted Answer

This is a gain-of-function mutation because it is producing a new pigment (red) rather than losing the ability to produce the wild-type pigment (tan). Additionally, since the mutation produces a visible phenotype (red coat color), it is likely dominant.

Suppose That a Mutation in a Coat Color Gene of a Mouse