Chapter 4 B Twin Studies A P Psychology

Chapter 4 (B): Twin Studies A. P. Psychology

Do-Now (Discussion) n n Think about someone you know who was adopted as a child: n In what ways are their personalities similar to their adoptive parent(s)? In what ways are they different? n 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 n Identical Twins: Twins who develop from a single fertilized egg that splits in two, creating genetically identical organisms n Same sex only n n Fraternal Twins: Twins who develop from separate fertilized eggs n Genetically no closer than brothers and sisters, but they share a fetal environment n

Identical Vs. Fraternal Twins

Separated Twins n 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). n 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

Genetics, Environment, and Personality: Twin Studies

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

Homework n Research Study Response #3: “Are You a ‘Natural? ’”(Pgs. 19 -27) n Chapter 4 A and B Quiz: “Nature, Nurture, and Human Diversity”