PSY 307 Lecture Notes - Lecture 8: Twin, Heritability, Chromosome
Document Summary
Derive from a single fertilized egg that is split. The equivalent of clones": genes the same at birth (share all alleles") If parents differ at a gene locus, share same allele" 50% the time. Allele: any of two or more alternative forms of a gene. Occupying the same position (locus) on a chromosome. Any differences must be due to the environment (but if separated, similarities due to genes) If they share the environment (totally) differences must be due to genes. Any similarities must be due to environment. The proportion of the total of observed phenotypic variation. Genetic contribution to between-person variation in personality/character traits is. Probably 30 to 60% of variation due to genes. Many beliefs/attitudes: ~same %, but more c 2 (shared environment) The environment not shared by family members. How the world you"ve encountered different from that encountered by your sibling. Asymmetry in how sib 1 and sib 2 treat each other.
