In a mapping experiment with three linked genes, which phenotype should occur most often in the F2 offspring?
A) Parental phenotypes.
B) Phenotypes of individuals with single crossover events.
C) Phenotypes of individuals with double crossover events.
D) All of the phenotypes should occur equally in the F2 generation.

Question

Quizplus · Accepted Answer

Since the three genes are linked, the parental genotypes are expected to be the most common in the F2 offspring, followed by individuals with single crossover events and then individuals with double crossover events. Because there are more possible ways for the linked genes to stay together during meiosis than to become separated, the parental genotypes are the most likely to be inherited by the F2 generation.

In a Mapping Experiment with Three Linked Genes, Which Phenotype