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Which one of the following is a wrong statement regarding mutations?

1. Deletion and insertion of base pairs cause frame-shift mutations.
2. Cancer cells commonly show chromosomal aberrations.
3. UV and Gamma rays are mutagens.
4. Change in a single base pair of DNA does not cause mutation.

Correct answer: Change in a single base pair of DNA does not cause mutation.

Solution

A mutation is any heritable change in DNA sequence, and it can be as small as a single base-pair change. So the statement saying a single base-pair change does not cause mutation is false; the other options are correct.

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