In a cross between a petite yeast mutant and a wild-type strain, results showed some petite and some wild-type outcomes. Which of these statements must be true of this petite mutation?
A)It is suppressive.
B)It is a nuclear or segregational mutation.
C)It is a neutral mitochondrial mutation.
D)It replicates faster than wild type.
E)It has small deletions of mitochondrial DNA.

Question

Quizplus · Accepted Answer

The fact that the petite mutation is not completely dominant and some wild-type outcomes were observed suggests that it is a nuclear or segregational mutation rather than a neutral mitochondrial mutation. It is not necessarily suppressive or faster replicating, and there is no information provided to suggest that it has small deletions of mitochondrial DNA.

In a Cross Between a Petite Yeast Mutant and a Wild-Type