The middle gene of a three gene mapping experiment can be determined by examining the genotypes of which of the following?
A) Offspring that resemble the parents.
B) Offspring that exhibit a single crossover event.
C) Offspring that exhibit double crossover events.
D) None of the answers are correct.

Question

Quizplus · Accepted Answer

Double crossover events can provide information about the order of genes and the relative distances between them. The middle gene can be determined by identifying the two crossover events and using the information to deduce the order and distance between the three genes. Offspring that resemble the parents or exhibit single crossover events do not provide enough information to determine the middle gene.

The Middle Gene of a Three Gene Mapping Experiment Can