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Natural Selection - R Trivers Anthro 204 Spring 2010 Natural Selection 1-What is it Natural selection refers to variation in individual

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R. Trivers Anthro 204 Spring 2010 Natural Selection 1--What is it? Natural selection refers to variation in individual reproductive success (RS) where RS = # of surviving offspring, often measured one generation later (sometimes less, sometimes more). 2--and evolutionary change: When variation in RS acts on genetic variation, there is evolution--in the sense of genetic change over time. It is critical that mortality or variation in reproduction act non- randomly , that is, favoring some at the expense of others with reference to their genetic traits. There is also some genetic change which is purely random. This kind of change produces no particular organization nor logic. Only natural selection results in coherent patterns, genes that contribute to high survival and reproduction being favored. 3--What does it consist of? mortality selection, mostly pre-reproductive variation in fecundity (parental investment, PI) sexual selection within-sex competition for access to the opposite sex (often male-male competition) between-sex choice (often female choice) 4--Power of selection
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This note was uploaded on 02/08/2011 for the course SOCIOLOGY 204 taught by Professor Trivers during the Spring '11 term at Rutgers.

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Natural Selection - R Trivers Anthro 204 Spring 2010 Natural Selection 1-What is it Natural selection refers to variation in individual

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