rn.genetics.utah.edu/content/evolution/barriers/ 3. Reproductive isolation reduces GENE FLOW between populations This means that each subpopulation evolves separately and can result in a new species. Isolating mechanisms fall into the following categories. For each category, identify which example(s) from the chart above matches it. Reproductive isolation: physiology prevents mating or producing fertile offspring. Ex. shape or reproductive organs not compatible Temporal isolation - timing isolation, individuals mate at different times of year. Example. frogs that mate in may versus those that mate in July. Behavioral isol -behaviors prevent mating. Ex. birds recognize mates by songs or dance Still confused? Here is more information on reproductive isolation: https://bio.libretexts.org/Bookshelves/Introductory and General Biology/Book%3A General Biology (Bo undless/18%3A Evolution and the Origin of Species/18.2%3A Formation of New Species/18.2B%3 A Reproductive Isolation

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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.