genes and behavior

Question 1

genes

Answer 1

sections of DNA that code for specific traits or functions

Question 2

MZ twins

Answer 2

identical twins that share 100% of their DNA

Question 3

DZ twins

Answer 3

fraternal twins that share 50% of their DNA

Question 4

Scarr and Wineberg (1983)

Answer 4

• to see if black children reared by white families preforemd better on IQ tests
• 101 adoptive families who had biological children but were also adopted transracially. Some children were white and other were black, and they were adopted at different ages. All children underwent IQ testing
• black children placed in white families inceased in IQ scores significantly compared to black children raised in their own home. Early adoption increased IQ. the correlation between the IQ of the adopted children and biological parents was higher than that of adopted children ad their adoptive parents
• 40-70% of IQ variance was due to genetic differences, but the environment can lead to an increase in the IQ