Question Detail
Question
When the presence or absence of an allele in one locus affect the expression of another allele in a different locus. This type of gene action is: a. Additive b. Epistatic c. Quantitative d. Dominant
Correct Answer
Option B is the correct answer.
Detailed Explanation
Epistasis occurs when the expression of one gene is influenced or masked by one or more other genes (at different loci). For example, a gene for pigment deposition might be masked by a gene that prevents pigment production altogether.
Hint
One gene stands on top of another.