In addition to determining genotypes, two- and three-factor testcrosses can be used to:
A) map gene loci.
B) screen recessive mutants.
C) measure heritability.
D) determine parental origin.
E) determine the physical location of genes.

Question

Quizplus · Accepted Answer

Two- and three-factor testcrosses are used in genetic mapping to determine the relative positions of genes on a chromosome by analyzing the recombination frequencies between them.

In Addition to Determining Genotypes, Two- and Three-Factor Testcrosses Can