Mapping studies have showed that within a group of mutants with the same growth requirements (i.e., the same overt phenotype), individual mutations are on different chromosomes.This indicates that
A) the same gene governs all the steps in a particular biological pathway.
B) different genes can govern different individual steps in the same biological pathway.
C) different genes govern the same step in a particular biological pathway.
D) all biological pathways are governed by different genes.
E) genes do not govern steps in biological pathways, but proteins do.

Question

Quizplus · Accepted Answer

Mapping studies have shown that different mutations within the same group can be located on different chromosomes, indicating that different genes can govern different individual steps in the same biological pathway. This suggests that biological pathways are often complex and involve the interaction of multiple genes and proteins.

Mapping Studies Have Showed That Within a Group of Mutants