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A friend insists that all mutagens are dangerous. How would you respond?

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Mutagens are chemical agents (or even ultraviolet or ionizing radiation) which can induce changes (or mutations) in the structure or sequence of DNA. What are some of the common types of mutations? There are additions (which insert base pairs into the chain), deletions (which remove base ...

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This solution defines mutagens and identifies the common types. It also explains the situations where they present a danger to organisms and when they are completely harmless.