Unit 3-C (B): Twin Studies

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Unit 3-C (B): Twin Studies Mr. McCormick A.P. Psychology

Do-Now (Discussion) Think about someone you know who was adopted as a child: In what ways are their personalities similar to their adoptive parent(s)? In what ways are they different? In what ways are their personalities similar to their biological parent(s), if known? What do you feel has a greater influence on one’s personality – one’s biological make-up or one’s familial environment?

Identical Vs. Fraternal Twins Identical Twins: Twins who develop from a single fertilized egg that splits in two, creating genetically identical organisms Same sex only Fraternal Twins: Twins who develop from separate fertilized eggs Genetically no closer than brothers and sisters, but they share a fetal environment Same or opposite sex

Identical Vs. Fraternal Twins

Identical Vs. Fraternal Twins

Separated Twins Identical twins who have been separated since birth tend to share many cognitive, behavioral, and social similarities with one another (more so than fraternal twins). Adopted children tend to share many cognitive, behavioral, and social similarities, with both their adoptive and biological parents; however, there tend to be stronger similarities with biological parents.

Genetics, Environment, and Personality: Twin Studies Assignment: Read “Genetics, Environment, and Personality” Answer Questions #1-3

Review Differentiate between Identical Twins and Fraternal Twins in terms of the following: Prenatal Development Genetic Make-up Physical Appearance To what extent do you attribute Nature and Nurture to the following: Personality “Intelligence”/IQ

Homework Research Study Response #3: “Are You a ‘Natural?’”(Pgs. 19-27) Chapter 4 Quiz: “Nature, Nurture, and Human Diversity” Unit 3 Test: “Biological Bases of Behavior” Chapter 6 Outline: “Sensation and Perception” Unit 3 Project: “3-D Brain Model”