Mary and her identical twin Jenny were told by their friends that even tho they are Identical twins that their DNA's are different.  Based on the information learnt in nature vs nurture explain if it is or  not true dispite being identical twins that Mary and Jenny have different DNA's

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.