Genes
Introduction
Part of the biological explanations – aggression caused by certain genes,
internal, inherited.
AO1
Twin studies:
Identical = MZ = 100% DNA shared
Fraternal = DZ = 50% shared
Look at concordance rate
Adoption studies:
If adopted children show same aggression levels as biological parents –
suggests strong genetic influence
Direct genetic research:
Collect DNA evidence from aggressive/non-aggressive groups and
compare
Family studies:
Identify forms of aggression over generations. Proband and incidence
rate
Studies based on view that genes make some people pre-disposed to
aggression.
AO2
Twin studies
+ X McGuffin and Gottesman: 87% concordance rate for aggressive and
anti-social MZ compared to 72% DZ. Both genetic and environmental
influence.
Introduction
Part of the biological explanations – aggression caused by certain genes,
internal, inherited.
AO1
Twin studies:
Identical = MZ = 100% DNA shared
Fraternal = DZ = 50% shared
Look at concordance rate
Adoption studies:
If adopted children show same aggression levels as biological parents –
suggests strong genetic influence
Direct genetic research:
Collect DNA evidence from aggressive/non-aggressive groups and
compare
Family studies:
Identify forms of aggression over generations. Proband and incidence
rate
Studies based on view that genes make some people pre-disposed to
aggression.
AO2
Twin studies
+ X McGuffin and Gottesman: 87% concordance rate for aggressive and
anti-social MZ compared to 72% DZ. Both genetic and environmental
influence.
