Question

"The isolation of cell-cycle mutations in yeast was greatly facilitated by the use of _______________ mutations, which allow investigators to study the effects of mutations that would be lethal if expressed constantly"

Answer 1

The correct answer is - conditional mutation.

Explanation:

Conditional mutation is a type of mutation that has less severe or wild-type phenotype or traits that physically appears under particular permissive environmental conditions and a mutant phenotype under particular restrictive environmental conditions.

Thus, the correct answer is a conditional mutation.