Define mutagen. Describe the effect of mutagens on the mutation rate.

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Define mutagen. Describe the effect of mutagens on the mutation rate.



Mutagen is an agent in the environment that brings about mutation. If a mutagen is present, it will usually increase the spontaneous rate of mutation, which is approximately 1 in 106 replicated genes, by a factor of 10-1000 times. This is a 1 to 3 order of magnitude increase, meaning a mutation rate of 10-6 becomes 10-5 or possibly 10-3.

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