Genetic Factors

Question 1

Who studies adult male MZ and DZ twins and found what concordance rates in physical and verbal aggression?

Answer 1

Coccaro et al
Physical -MZ 50% DZ 19%
Verbal - MZ 28% DZ 7%

Question 2

Rhee and Waldman did a what study? On adoption and found what % was genetic influence ?

Answer 2

Meta analysis
41%

Question 3

The MAOA gene controls production of the enzyme … … A (MAO-A) which regulates …

Answer 3

Monoamine oxidase
Serotonin

Question 4

Which gene variant of MAOA is linked to increased aggression ? High or low

Answer 4

Low

Question 5

MAOA-L gene was passed by who which is how it got its warrior name

Answer 5

New Zealand maori males ( historically ferocious)

Question 6

Who studied 28 male family members repeatedly involved in impulsive violent behaviours?and what did they find?

Answer 6

Bruner et al
Men had low MAO-A enzyme reducing serotonin)
And the MAOA-L gene

Question 7

Frazetto found an association between … aggression and the … gene in adult males. But only those who had experienced significant….during the first … years of their life.

Answer 7

Antisocial
MAOA-L
Trauma
15