CRIM 103 Lecture Notes - Complications Of Pregnancy, Smoking And Pregnancy, Limbic System

• School: Simon Fraser University
• Department: Criminology
• Course: CRIM 103
• Professor: Jennifer Wong

Document Summary

Born with genetic dispositions, but environment plays a role. > 83% of boys married girls with criminal records. > more likely to have criminal children (maybe due to genetics, but also from parent"s behaviour) Cannot determine relative impact of genetics versus environment. Compare twin behaviour to examine genes versus environment. Monozygotic are true twins, completely identical genetic makeup. Dizygotic are fraternal twins, genetically different (not identical) Higher rates of similar behaviour in monozygotic twins. Prenatal and living experiences affecting twins in same versus different ways. Nonshared influences increase with age; shared decrease. Degree to which pairs of subjects both show particular behaviour or condition. 50 pairs monozygotic and 50 pairs of dizygotic twins. > if 25 pairs of mz have same iq score, concordance = 50% > if 10 pairs of dz have same iq score, concordance = 20% > 52% concordance for mz, 21% for dz. Genes predispose; life experiences increase or decrease this risk.