genetic factors aggression

Question 1

twin studies

Answer 1

mz share 100% genes, dz share 50% genes

therefore any greater similarities in agg behaviour found between mz must be genetic

Question 2

adoption studies

Answer 2

adopted child similar in agg - biological parent = genetic influence

adopted child similar in agg - adopted parent = environmental influence

Question 3

MAOA gene

Answer 3

responsible for producing maoa
- regulates metabolism of seratonin in brain
- low version of this gene = low MAOA = low seratonin
- leads to aggressive behaviour