Anthropology Study Sheet exam 1

Anthropology Study Sheet exam 1 - Anthropology Study Sheet...

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Anthropology Study Sheet Ch1: Adaptation- a feature of an organism generated by natural selection/ before Darwin, there was no scientific explanation for the fact that organisms are well adapted to their circumstances Equilibrium- steady state in which neither gene frequencies nor genotypic frequencies change. Stabilizing selection- selection pressures that favor the average phenotypes/ it reduces the amount of variation but does not alter the mean value of the trait/ selection preserves the status quo when the most common type is the best adapted (it produces equilibrium) Species- populations of varied individuals that may or may not change through time Continuous variation- phenotypic variation in which there is a continuum of types (Ex: height of humans) Discontinuous variation- phenotypic variation in which there are discrete numbers of phenotypes with no intermediate types (Ex: Mendel’s pea plant color)/ these are not important for the evolution of complex adaptations bc complex adaptations are unlikely
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This note was uploaded on 05/09/2008 for the course ANT 301 taught by Professor Reed during the Spring '08 term at University of Texas at Austin.

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Anthropology Study Sheet exam 1 - Anthropology Study Sheet...

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