Multiple choice

An organism's phenotype is all of its observable characteristics. In which of the following mutations is the original phenotype of an organism restored?

  1. Lethal mutations

  2. A back mutation

  3. Antimorphic mutations

  4. Loss-of-function mutations

  5. Gain-of-function mutations
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A back mutation or reversion is a point mutation that restores the original sequence, and hence, the original phenotype.

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