PSYC 1 Lecture Notes - Lecture 5: Twin, Scurvy, Extraversion And Introversion
Document Summary
Identical vs. fraternal twins identical twins develop from single fertilized eggs. Don"t always have the same number of copies of genes. Studies of identical vs. fraternal twins, separated twins, and biological vs. adoptive relatives allow researchers to tease apart the influences of heredity and environment. Separated identical twins: maintain same genes while testing effects of different home environments. Adoptive families: maintain home environment while studying effects of genetic differences. Studies of twins in adulthood show that identical twins are more alike than fraternal twins in: Similarities found in identical twins despite being raised in different homes: Sometimes identical twins that are separated are placed in similar homes, resulting in similar interests / fears / etc. Studies conducted with adoptive children for whom the biological relatives are known: adopted children seem to be more similar to their genetic relatives than their environmental/ nurture relatives. Despite strong impact of genetics on personality, parenting has an influence on:
