Family Studies

Question 1

Brunner et al. (1993)

Answer 1

Conducted an analysis of a large family in the Netherlands, a number of which had been responsible for various counts of anti-social and criminal behaviour including violent crime

Question 2

What is ‘Brunner syndrome’?

Answer 2

Researchers found that the males had a genetic condition carried by females affecting the MAOA production gene on the single X chromosome in males

Question 3

What does Brunner syndrome cause?

Answer 3

Results in lower intelligence levels and excess serotonin due to the lack of MAOA enzyme not being able to consume excess serotonin.

Question 4

What does too much serotonin lead to?

Answer 4

Having too much serotonin leads to impulsiveness and lack of fear of consequences