(B) sudden and heritable change in the genetic material ($DNA$ sequence) of an organism is known as $Mutation$. Mutations are the primary source of ge

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(B) sudden and heritable change in the genetic material ($DNA$ sequence) of an organism is known as $Mutation$. Mutations are the primary source of genetic variation in a population. While point mutations are specific types of mutations,the general term for a sudden change in the genetic makeup is $Mutation$.