The Biological Species Concept states that O If organisms have greater than 99% DNA similarity, they are the same species If organisms have the same number of chromosomes, they are the same species If organisms can breed together and produce fertile offspring, they are members of the same species Organisms with a high degree of DNA similarity are closely related

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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.