PSYB30H3 Lecture : Chapter 6 notes.docx
Document Summary
Genotype: unobservable genetic constitution, fixed at birth, features of development, switch on & off. Phenotype: observable behavioural characteristics (level of anxiety), changes over time. Behavioural genetics: study of the genetic and environmental contributions to individual differences in personality and behaviour. Nature and nurture transact: genes and environment can work separately, together, or they may influence one another. Genotype-environmental correlation: people change environments and environments change people, so we really can"t separate the impact of genes on environment. Heritability: (h2) the amount of observed individual differences in some characteristic that can be accounted for by genetic differences. Refers to differences across a group or population of people, not to a specific person. It is the inheritance of a particular trait in a particular population at a particular time. The heritability of height is 80% is the u. s. but it"s only 65% in china and western africa, in australia it is.
