heredity and environment lesson 6-4. objectives give examples of the effects of heredity and...
TRANSCRIPT
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?– Due to environment
Heredity- the genetic transmission of characteristics
Heredity and Environment
Inherited factors and environment work together.
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
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.
Genes and Behavior
Genes are basic units of heredity
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
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
Closure
Research current articles about nature vs. nurture
Would you be in favor of being able to select the behavior characteristics of your children?