Question

When will a mutation always have no effect on an organism?


if the mutation is caused by exposure to the environment


if the mutation does not get passed to its offspring


if the mutation gets repaired by the organism


if the mutation occurs in the organism’s DNA

Answer 1

If the mutation gets repaired by the organism.

A successful DNA repair restores the original sequence, so there is no lasting change in the gene and therefore no effect. The other choices are not guaranteed to cause no effect: environmental mutations can be harmful, somatic (not inherited) mutations can still affect the individual, and every mutation by definition occurs in DNA.