Biology 1001A Chapter Notes - Chapter Cycle 6: Allele Frequency, Genotype Frequency, Genetic Variation
4 Apr 2017
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Document Summary
Microevolution is a small-scale genetic changes within populations, often in response to shifting environmental circumstances or chance events. Change in frequencies of alleles or heritable phenotypic variants over a population time. Scientists study this to analyze variations in natural populations. Population is all individuals of a single species that live together in the same place and time. Phenotypic variation is differences in appearance or function between individual organisms. If a difference is heritable it"s passed from generation to generation. Quantitative variation is variation that is measured on a continuum (such as height in human beings) rather than in discrete units or categories. Data is usually displayed in a bar graph. Mean is the average value of the character. Qualitative variation is variation that exists in two or more discrete states, with intermediate forms often being absent. Snow geese have blue or white feathers, no in between.
