AP Biologyeasymcq1 pt
In epistasis, one gene
A.masks the phenotypic effect of another gene
B.blends with another gene's effect
C.is expressed only in males
D.duplicates another gene exactly
Explanation
Core Concept
Epistasis occurs when the genotype at one locus changes or masks the phenotypic effect of another locus. A classic example is Labrador retriever coat color, in which one locus controls pigment type and another controls whether pigment is deposited, producing a modified dihybrid ratio. The exact numerical ratio depends on the biological interaction and should not be generalized across different examples.
Correct Answer
Amasks the phenotypic effect of another gene
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