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Chapter 3: Genetic Influences on Behavior: Nature & Nurture work together to shape us . Outline 1. Genes 2. Evolutionary Psychology 3. Behavior Genetics 4. Environmental Influence 5. The Nature and Nurture of Gender. I. Genes: Our Biological Blueprint.
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Chapter 3: Genetic Influences on Behavior: Nature & Nurture work together to shape us
Outline 1. Genes 2. Evolutionary Psychology 3. Behavior Genetics 4. Environmental Influence 5. The Nature and Nurture of Gender
I. Genes: Our Biological Blueprint Genes enable our biology, which in turn enables our behavior • Chromosomes • DNA (deoxyribonucleic acid)
I. Genes: Our Biological Blueprint • Genes • Genome
Nucleus Chromosome Gene Cell DNA I. Genes: Our Biological Blueprint
II. Evolutionary Psychology Study of how natural selection favored behavioral tendencies that contribute to the survival & spread of our ancestors genes. • A. Natural Selection
II. Evolutionary Psychology • B. Mutation
II. Evolutionary Psychology • C. Sexuality: Our natural yearnings are our genes’ way of reproducing themselves • Gender
II. Evolutionary Psychology • C. Sexuality
III. Behavior Genetics Study individual differences weighing genetic & environmental contributions to our various traits. A. Twin Studies • Identical Twins: • Fraternal Twins:
Identical twins Fraternal twins Same sex only Same or opposite sex III. Behavior Genetics
III. Behavior Genetics • Twin Studies: • Identical twins • Separated Twins –
III. Behavior Genetics B. Adoption Studies
III. Behavior Genetics • C. Temperament • D. Heritability
III. Behavior Genetics • E. Gene-Environment Interaction • F. Molecular Genetics
IV. Environmental Influences ½ of population differences are from genes & the other ½ is from Environment. • A. Parents
IV. Environmental Influences • B. Prenatal Environment
Rat brain cell Impoverished environment Rat brain cell Enriched environment IV. Environmental Influences • C. Experience & Brain Development
IV. Environmental Influences • C. Experience & Brain Development Not trained Trained
IV. Environmental Influences • D. Peer Influence
IV. Environmental Influences • E. Culture: • Norms: • Personal Space • Punctuality • Pace of life • Memes:
V. The Nature & Nurture of Gender A. Nature of Gender: male & female are different as a result of genetics & sex hormones • X Chromosome • Y Chromosome
V. The Nature & Nurture of Gender A. Nature of Gender: • Testosterone
V. The Nature & Nurture of Gender B. Nurture of Gender • Role • Gender Role • Gender Identity • Gender-typing
V. The Nature & Nurture of Gender • Social Learning Theory • Gender Schema Theory