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13 August, 05:43

Some mutagens cause genetic changes that can be "corrected" by re-exposing cells to the same mutagen. Other mutagens do not behave in this way. Provide one example of each of these two types of agents and describe the mutational changes caused in DNA. Explain why some mutagens behave in one way, while others do not.

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  1. 13 August, 06:03
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    Mutagen:

    It's any agent that can cause changes to the a cell genetic makeup by altering the deoxyribonucleic acid (DNA)

    It can be a Physical mutagens (e. g X-rays), chemical mutagens e. g Nitrous acid or biological mutagens as in transposons

    Examples of mutagens that cause genetic changes that can be "corrected" by re-exposing cells to the same mutagen are the ones that caused base substitutions (e. g nitrous acid) and Frameshift mutations (e. g proflavin)

    A mutagen that do not cause genetic changes like deletion that can be "corrected" Such as by re-exposing cells to the same mutagen is the X rays.
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