The human population went through a genetic bottleneck around 70,000 years ago, resulting in a reduction of genetic diversity. Which evolutionary process played a significant role in shaping human genetic diversity during this event? Genetic drift Gene flow Sexual selection Natural selection

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Q: DNA-based

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A: It's depends on how fast new mutation occur

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A: Evolution is change in the heritable characteristics

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A: The correct answer is second one that is genetic drift.

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A: Natural selection is a type of evolutionary force which enhances the survival of an individual.

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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.