The graph below shows the (fictitious) relationship between the natural log of juvenile survival versus individual inbreeding coefficient for two isolated populations from the same species. The relationship is shown by a red line for isolated population 1 and by a blue line for isolated population 2. Natural log juvenile survival B = -2.2 B = -4.5

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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.