PSYC 100 Lecture Notes - Leptin, Heritability, Heredity

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 100
• Professor: Jaime Palmer

Document Summary

Alleles: alternate forms of a gene that produce different characteristics. Study how heredity and environmental factors influence psychological factors. Twins have a genetic heredity of 1; siblings . 5% Adoption studies: compare adopted children to adoptive parents and biological parents. Twin studies: compare concordance rates for identical and fraternal twins. Monozygotic twins: 1 egg & 1 sperm. Dizygotic twins: 2 eggs & 2 sperm. Genotype, shared environment & unshared environment = group variation on a psychological trait. Estimates the proportion of trait variance due to genetic variance within a group. Maximum value = 1. 00 (100% of the variance) Rules: applies only to a particular group in a particular environment. (consider characteristics) Genetic traits have a range of possible phenotypes. There are individual differences in reaction ranges. Shared/unshared environments lead to differences in genetic tendencies. Genetic characteristics influence the environmental factors that children are exposed to. Genetics as a research tool: knockout procedure.