Which phenomenon tends to decrease the number of phenotypic classes in dihybrid crosses?
A) Incomplete dominance
B) Epistasis
C) Multiple alleles
D) Codominance
E) Pleiotropy

Question

Quizplus · Accepted Answer

Epistasis occurs when the expression of one gene affects the expression of another gene. This can result in the reduction of the number of phenotypic classes in dihybrid crosses as the expression of one gene can mask the expression of another, leading to fewer observable traits.

Which Phenomenon Tends to Decrease the Number of Phenotypic Classes