Evolution

Question 1

Discuss genes and aggression

Answer 1

MAOA gene encodes an enzyme that breaks down serotonin, dopamine, noradrenaline.
Ppl with a deficit of this enzyme may not break down these enzymes as much which means they have increased levels -reuptake- and therfore have heightened aggression
(Caspi et al- low activity maoa gene and childhood malnourishment [interactionalist])

Question 2

Twin stin studies for aggression

Answer 2

genetic component, as identical twins (who share 100% of their genes) are more likely to exhibit similar aggressive behaviors than fraternal twins (who share 50% of their genes).
Monozygotic- 50%
Dizygotic- 19%