Point mutation is a change which involves

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(D) point mutation is a type of mutation that causes a single nucleotide base substitution,insertion,or deletion of the genetic material,$DNA$ or $RNA

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Change in a base of a gene

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(D) point mutation is a type of mutation that causes a single nucleotide base substitution,insertion,or deletion of the genetic material,$DNA$ or $RNA$.Specifically,it involves a change in a single base pair of a gene.An example of a point mutation is the substitution of a single base in the gene for beta-globin,which causes sickle cell anemia.

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