The mutant strain you are working with in the lab has suddenly reverted to the wild type phenotype. Molecular techniques reveal that the original mutation is still present. What could have happened?

Question 6Answer
a.

Mutation leading to a reversal of the original mutation
b.

Mutation leading to a pseudorevertant
c.

Mutation leading to a point mutation
d.

Mutation leading to a true revertant

Question

The mutant strain you are working with in the lab has suddenly reverted to the wild type phenotype. Molecular techniques reveal that the original mutation is still present. What could have happened?

Question 6Answer
a.

Mutation leading to a reversal of the original mutation
b.

Mutation leading to a pseudorevertant
c.

Mutation leading to a point mutation
d.

Mutation leading to a true revertant

Accepted Answer

***B*** ∻Key Concept∻ ⚹Pseudorevertant⚹ ∻Explanation∻ ⚹A pseudorevertant occurs when a second mutation compensates for the effect of the first mutation, restoring the wild type phenotype without reversing the original mutation.⚹◊What mechanisms could explain the sudden reversion of a mutant strain to wild type phenotype while the original mutation is still present, as revealed by molecular techniques⍭ Generate me a similar question◊

Sia