Lecture 09

Question 1

Heritability

Answer 1

estimates the proportion of the phenotypic variation in a population due to genetic differences

one way:
compare the proportion of people sharing a discrete trait to the proportion predicted to share the trait

Question 2

Twin studies

Answer 2

largely replaced adoption methods

• adoption methods:
  1) environmental influences (adopted people & adopted parents)
  2) genetic influences (adoptees and their biological parents)

concordance measure the freq of expression of a trait in both members of monozygotic or dizygotic twins

Question 3

dizygotic twins

Answer 3

shared environment and 50% of genes

Question 4

monozygotic twins

Answer 4

identical genotype and shared environment

Question 5

twins raised apart

Answer 5

shared genotype but not environment

Question 6

adopted individuals

Answer 6

shared environment but not genes