what is mutation...explain with an example..
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Mutations. Definition. A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
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changes that take place in the generic structure of a living or developing thing is called mutation.
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example, 1.sickle cell anemia is caused by a substitution in the beta-hemoglobin
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