PSYC 100 Chapter Notes - Chapter 4: Twin, Extraversion And Introversion, Agreeableness

• School: George Mason University
• Department: Psychology
• Course: PSYC 100
• Professor: Peter Frecknall

Document Summary

Behavior geneticists: study our differences and weigh the effects and the interplay of heredity and environment. 46 chromosomes (23 from mom"s egg and 23 from dad"s sperm) Dna: a coiled chain of molecules that make up chromosomes. 20,000 to 25,000 which are either active or inactive provide the code for creating protein molecules, our body"s building blocks explain both our shared human nature and our human diversity. Fraternal twins developed from two separate fertilized eggs: biological versus adoptive relatives. Adoption creates two groups: genetic relatives: biological parents and siblings. Religious involvement is genetically influenced but a pair of adopted children or identical twins will, especially during adolescence, have more similar religious beliefs if raised together: environment relatives: adoptive parents and siblings. Parents (biological or adoptive) do influence their children"s attitudes, values, manners, politics, and faith. Emotionally reactive newborns tend to be at 9-months old. Shy 6-month-olds tend to stay shy as 13-year-olds.