SE day 3 - Social Evolution Lecture outline 1/30...

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Social Evolution Lecture outline – 1/30 Adaptations -It is often difficult to speculate as to the adaptive significance of traits • you will never be able to test the hypothesis of how the trait evolved • Rudyard Kipling wrote “Just So” Stories • Panglossian Paradigm • Gould & Lewontin people need to stop making stories about how organisms came up with their adaptive traits • Voltaire’s Candide- everything has adapted to suit a specific purpose • human nose and spectacles *Not every single trai can or must be explainable as adaptive Behavior can be Genetic but not adaptive • Phylogenetic Inertia you’re stuck with what you’re given (ancestral baggage that becomes maladaptive) i.e. when environment changes quicker than behavior (moth’s attraction to natural light, human adaptation to bipedal locomotion, armadillo’s defensive mechanism to jump in the air) • Genetic Drift- random shift in gene frequency that is not due to adaptation by natural selection (arbitrary sorting of genotypes) • Founders Effect- population goes through a “bottleneck” and only a few individuals make it to new or isolated habitat 1/1,000,000 have gene for 6 digits, original population of 1 man and 4 women, man carries gene for 6 digits, 10 generations later population =300, gene frequency for 6 digits is 9/10. Evolution is occurring but not due to natural selection
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This note was uploaded on 02/04/2012 for the course SOC EVO 204 taught by Professor Jacobson during the Spring '12 term at Rutgers.

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SE day 3 - Social Evolution Lecture outline 1/30...

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