Mutations That are Lethal in One Environment but Viable in Another

Question

Mutations that are lethal in one environment but viable in another are known as:
A) Lethal mutations
B) Conditional lethal mutations
C) Null mutations
D) Isoallele mutations
E) All of these

Accepted Answer

Conditional lethal mutations are mutations that are lethal in one environment but viable in another. Option A is not entirely correct because all lethal mutations do not fall under this category. Option C is incorrect because null mutations are mutations that completely eliminate the function of a gene. Option D is an incorrect term. Option E is incorrect because only one option (B) is correct.