Which of the following statements is CORRECT regarding models of adaptation that invoke allele-frequency adaptive landscapes? They assume that natural selection can either increase or decrease population mean fitness as long as there is no genetic dominance at any of the loci. O They assume that natural selection can only increase population mean fitness, which means that populations can get "stuck" on local peaks associated with lower fitness than the global optimum. We can assume that such landscapes have multiple peaks only when there is no epistasis for fitness among any of the loci under consideration.

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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.