ASTRON 2B03 Chapter Notes - Chapter 9: Human Genome Project, Twin Study, Behavioural Genetics
14 Oct 2014
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Evolutionary psychology: explains how patterns of behaviour that characterize all humans originated in the survival value these characteristics provide over the history of the species. Behavioural genetics: explains how individual differences in behaviour (personality traits) are passed from parent to child and shared by biological relatives, controversy. Belief that humanity could and should be improved through selective breeding. Belief that behaviour is unchangeable and fixed. Personality is a complex interaction between genes and environment. Give them: epq, cpi and neo-pi personality tests. Compute the heritability coefficient across pairs of twins. Mz scores should be more correlated than dz scores if the trait is influenced by genetics. Average heritability of many traits is about 0. 40 according to twin studies. Similarities in personality across different kinds of relatives. Average heritability of most traits is about 0. 20 according to non-twin studies. Effects of genes are interactive and multiplicative rather than additive.
