PSYB30H3 Chapter Notes -Behavioural Genetics, Genetic Screen, Mendelian Inheritance
Document Summary
Genotype: genetic makeup that codes for a specific trait. Behavioural genetics: the study of the genetic and environmental contributions to individual difference in personality and behaviour. Certain environments have different effects on people depending on their specific genetic makeup = genotype-environment interaction. People change environments and environments change people, making it hard to find the impact of genes on environment = genotype-environment correlation. Phenotype: manifestation of genes, the observable physical or psychological trait that is coded by genes. Phenotype = genotype + environment + gene-environment correlation + gene- environment interaction. Heritability (h2): amount of observed individual differences in some characteristic that can be accounted for by genetic differences. Refers to differences across a group/population, not an individual. Refers to the inheritance of a particular trait in a particular environment at a particular time. Environmentality (e2): estimates the extent to which observed individual differences can be traced in any way to individual differences in environment.
