PSYC39H3 Chapter Notes - Chapter 3: Smoking And Pregnancy, Protective Factor, Peripheral Nervous System
Document Summary
Genetic and biological factors are now given respectable status, though not center stage. Questions: determining how much of antisocial behaviour is influenced by genes and, deciding which specific genes predispose a person to which kinds of antisocial behaviour. Genetics and antisocial behaviour: behaviour genetics focuses on examining the role genes play in the formation and development of human animal behaviour. Investigates the relationship between genes and the environment. Environmental influences shared by siblings (e. g. family environment) Influences that arise from unshared environmental experiences that makes siblings differ from one another. The magnitude of these genetic and environmental influences is usually obtained from statistical analyses that compare identical twins with fraternal twins, who like ordinary siblings share one-half of their genes. Dizygotic twins (dz) fraternal twins; develop from two different fertilized eggs and are no more genetically alike than nontwin siblings. Monozygotic twins (mz) identical twins; develop from a single egg: chorion problem.
