Chapter 3C Outline
Kelly Krawczyk Psych Outline Unit 3C ? Genetics, Evolutionary Psychology, and Behavior Behavior Genetics: Prediction Individual Differences Genes: Our Codes for Life 46 chromosomes: 23 from mother, 23 from father Genes can be active (expressed) or inactive Environment can ?turn on? genes Most traits are influenced by genes Twin and Adoption Studies Identical Versus Fraternal Twins Identical ? have same genes but not always same # Most identical share placenta but 1/3 have separate Shared genes can translate into shared experiences Separated Twins Separated twins are almost as similar as twins together Twin-study gave more appreciation to genetic influence Biological Versus Adoptive Relatives Genetic relatives, environmental relatives Adoptees are more similar to biological parents