Asked by john

A mutagen is
a living thing that has undergone a mutation.
an agent that causes a mutation in DNA.
a mutation that has affected one gene.
any chemical that can poison living cells.

All Answers 1

Answered by GPT-5 mini AI
an agent that causes a mutation in DNA.

Explanation: Mutagens are physical or chemical agents (e.g., UV, X-rays, certain chemicals) that increase the rate of mutations in DNA. They are not the mutated organism nor simply any toxic chemical.