Unit 2: AC2.1 - Twin and adoption studies - Genetic theories BIO Flashcards
1
Q
What does twin studies look at?
A
Twins that have been raised in the same household
2
Q
What two types of twins are there and what is the % of genes that they share?
A
- Dizygotic (50%)
- Monozygotic (100%)
3
Q
Who did a study for twin studies?
A
Caccaro et al
4
Q
What did Caccaro et al find?
A
Concordance rates of 50% for MZ twins for aggressive behaviour in comparison to 19% for DZ twins
5
Q
What does adoption studies look at?
A
Siblings who have been raised in different households/environments
6
Q
Who did a study for adoption studies?
A
Mednick
7
Q
What did Mednick look at?
A
14,427 court convictions of adopted children and the criminal records of both types of parents
8
Q
What did Mednick find?
A
If adoptive father had conviction, child has 10% chance of getting conviction compared to 21% biological father
