Chapter 3, The Nature and Nurture of Behavior Evolutionary Psychology Genes (DNA segments that form the chromosomes) are the biochemical units of heredity. They provide the blueprint for protein molecules, the building blocks of our physical and behavioral development. Evolutionary psychologists study how natural selection has shaped our universal behavior tendencies. They reason that if organisms vary, if only some mature to produce surviving offspring, and if certain inherited behavior tendencies assist that survival, then nature must select those tendencies. They believe this helps explain gender differences in sexuality. Critics maintain that evolutionary psychologists make too many hindsight explanations. Behavior Genetics Behavior geneticists explore our individual differences. Using methods such as twin, adoption, and temperament studies, they identify the heritability of various traits and disorders. Studies of the inheritance of temperament, and of twins and adopted children, provide
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 02/14/2010 for the course PSY 101 taught by Professor Jackson during the Spring '08 term at Michigan State University.