Chapter 15 Human Behavior

Chapter 15 Human Behavior - Human Behavior Readings •...

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Unformatted text preview: Human Behavior Readings • Required reading is the beginning of Ch. 15 (see below) and all of Ch. 16 of HHE. 1 Variation * pp. 402–407 Environmental and genetic variation • Genetic variation is variation due to genes inherited from parents • Environmental variation is all other variation: – – – – Disentangling variation • Most complex traits have strong effects of both environment and ge- netics • Scientists study sources of variation by manipulating matings and con- trolling environmental conditions – How well does genetic similarity predict trait similarity? • This is not practical with people – 1 Within- and between-group variation • We are interested in variation within and between groups at different scales – Species – Populations • Causes of variation can be different at different scales Scales of variation • Different kinds of variation may be important at different scales • Arm strength – The difference in arm strength between humans and chimpanzees is mostly genetic – The difference in arm strength between a village full of farmers and a village full of traders is (probably) mostly environmental – The difference in arm strength within a village full of farmers is (probably) mostly genetic Example: Szechuan food • Most people from Szechuan like Szechuan food more than most people from Saskatchewan do – • Some people from Szechuan don’t like Szechuan food – • Fig. 15.17 2 2 Genetics and behavior * pp. 431–436 People are complicated • People are evolved organisms • People have very complex brains, and complex cultures, that are hard to explain in pure adaptive terms – – • Evolutionary explanations have some relevance for explaining human behavior – How much relevance is controversial Genetic determinism • Very little in human behavior is determined by our genes • Does this mean that genetics, evolution and adaptation are irrelevant...
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This note was uploaded on 04/13/2011 for the course BIO 1M03 taught by Professor Jonathanstone,jamesquinn during the Spring '11 term at McMaster University.

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Chapter 15 Human Behavior - Human Behavior Readings •...

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