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Heredity and Environment

Heredity and Environment. Lesson 6-4. Objectives. Give examples of the effects of heredity and environment on behavior Summarize research on the effects of heredity and environment on behavior. Heredity and Environment. Is behavior instinctive? Due to heredity Is behavior learned?

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Heredity and Environment

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  1. Heredity and Environment Lesson 6-4

  2. Objectives • Give examples of the effects of heredity and environment on behavior • Summarize research on the effects of heredity and environment on behavior

  3. Heredity and Environment • Is behavior instinctive? • Due to heredity • Is behavior learned? • Due to environment • Heredity- the genetic transmission of characteristics

  4. Heredity and Environment • Inherited factors and environment work together.

  5. Nature vs. Nurture • Has been going on for centuries • Nature- what a person inherits • Nurture- refers to environment • Sir Francis Galton- Heredity Genius • Analyzed families • Found success ran in families

  6. Heredity and Environment • John Watson- behavior psychologist • “Give me a dozen healthy infants, well-formed and my own specified world to bring them up in and I’ll guarantee to take any one at random and train him to become any type of specialist I might select- a doctor, lawyer, and yes, even beggerman and thief, regardless of his talents, tendencies, abilitities, and race of his ancestors.

  7. Genes and Behavior • Genes are basic units of heredity

  8. Twin Studies • Study identical twins to see if a trait is inherited • Twins developed from a single fertilized egg • Share same genes • Fraternal Twins • Develop from two eggs • Same as brother and sister

  9. Twin Studies • Also study twins who were separated at birth • Despite different backgrounds, many share same common behaviors • Do well in math, trouble in spelling • Drinking patterns

  10. Closure • Research current articles about nature vs. nurture • Would you be in favor of being able to select the behavior characteristics of your children?

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