BIOL 1001 Study Guide - Midterm Guide: Backcrossing, Ring Species, Reproductive Isolation
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Test 2 los: microevolution: genetic variation & mutation & hardy-weinberg principle. Population: all individuals of a single species that live together in the same place and time. Microevolution: changes in genetic characteristics of a population over time (traits depend on genetics and environment); occurs in a shorter time compared to macroevolution; occurs when the allele frequencies in a population change. Phenotypic variation: differences in appearance or function between individual organisms. Qualitative variation: variation that exists in two or more discrete states, with intermediate forms often being absent. Quantitative variation: variation that is measured on a continuum (such as height in human beings) rather than in discrete units or categories. Mean value of characteristic: average value of the characteristic. Explain why variation in populations is important to evolution. In order for evolution to occur, there must be genetic variation that is heritable. e. g. fly experiment. After each generation, more flies survived longer (heritable)
