PSYC 111 Lecture Notes - Lecture 4: Eating Disorder, Antisocial Personality Disorder, Relational Aggression

• School: Binghamton University
• Department: Psychology
• Course: PSYC 111
• Professor: Lanora Duell

Document Summary

Behavior genetics: behavior geneticists study our differences & aim to determine importance of heredity & environment on behavior (non-genetic influence) Every cell nucleus controls the genetic master code for body. Each cell has 46 chromosomes (23 from mom, 23 from dad) Each chromosome composed of coiled chain of molecule called dna. Genes are dna segments that when turned on, provide code for production of protein molecules; biochemical units of heredity that make up chromosomes, thread-like coil of dna. Approximately 20,000-25,000 genes that compose human body determine our development. Twins: identical twins develop from a single fertilized egg; fraternal twins from 2; identical twins do not always have same # of copies of genes; not all identical twins share same placenta. Separated identical twins- maintain same genes while testing effects of different home environments. Adoptive families- maintain home environment while studying effects of genetic differences.