PSYC 2740 Chapter Notes -Twin Study, Behavioural Genetics, Heritability

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Chapter six: the biological domain: genetics & personality. Genome: refers to the complete set of genes an organism processes: the human genome contains between 20,000 and 30,000 genes; all located on 23 pairs of chromosomes. What is heritability? (and what methods do geneticists use to get their answers?) It provides useful information in identifying the genetic and environmental determinants of personality. The environmental contribution is defined in a similar way: the percentage of observed variance in a group of individuals that can be attributed to environmental (nongenetic) differences called environmentally. One misconception about heritability is that it can be applied to a single individual, it can"t. it refers only to differences in a sample or population, not an individual. Heritability always depends on both the range of genetic differences in the population and the environmental differences that population. Last misconception is that heritability is an absolutely precise statistic.

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