PSYC 2000 Lecture Notes - Lecture 4: Y Chromosome, Heritability, Parenting Styles
Document Summary
Genome: complete instructions for making an organism, complex traits a combination of genes, humans and animals. Twin and adoption studies: allow us to control, heredity while varying the home environment, home environment while varying heredity, types of studies, identical vs. fraternal twins, separated twins, comparing adoptive vs. biological relatives. Identical twins: develop from a single fertilized egg; creating two genetically identical organisms ( same sex always) Fraternal twin who"s divorce: odds go up 1. 6 times: but twins are often treated alike. Striking similarities in personalities, attitudes, abilities, interests, and fears: appearance affects treatment, adopted twins place in similar environments, strangers have similarities too. Biological vs. adoptive relatives: are adopted children more like their adoptive parents or their biological ones, environment has little effect on personality, but parents affect attitudes, values, manners, faith, and politics. Temperament and heredity: temperament: a person"s characteristic emotional reactivity and intensity, heritability: proportion of variation among individuals that we can attribute to genes.
