Chapter 4 Text Notes

Chapter 4 Text Notes - Chapter 4: Genes, Evolution, &...

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1 Chapter 4: Genes, Evolution, & Behaviour What is the basic cause of human behaviour? Is it something about a person’s gene’s or is something about the environment they live in? And how would we be able to tell? Chapter 4 goes into these issues looking at the relative contribution of genes and the environment to a variety of human behaviours. 1. Genes and Chromosomes The first few pages of Chapter 4 deal with the basics of genetic action. Be sure to note the difference between genotype and phenotype , and the action of dominant versus recessive traits. Most interesting human behaviours and traits reflect multiple gene action. Make sure you know the concept of heritability . This is discussed both in the text on p. 138 and in lecture. 2. Twin Studies The study of twins is central to an investigation of heritability. We need some way to estimate the degree of genetic contribution and looking at identical twins who have been raised apart does this for us. Note the concept of concordance and the work by Bouchard. 3.
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Chapter 4 Text Notes - Chapter 4: Genes, Evolution, &...

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