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Can someone please explain what types of mutations that affect chromosomes are least...

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forestowl | Student, Grade 11 | eNotes Newbie

Posted October 15, 2012 at 9:32 PM via web

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Can someone please explain what types of mutations that affect chromosomes are least likely to be important in evolution and why?

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trophyhunter1 | College Teacher | (Level 3) Senior Educator

Posted July 15, 2013 at 1:02 PM (Answer #2)

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The mutation you are referring to is a neutral mutation. This type of mutation does not affect the fitness of an organism. An example is when a DNA triplet is changed but still produces that same amino acid in the protein chain. Because the amino acids can be coded by more than one triplet, even if a nitrogenous base changes, but it still produces the same amino acid, this mutation will not affect the function of the protein. Another definition is that a neutral mutation has no selective advantage or disadvantage, therefore, it does not harm the organism.

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