Genetic Explanation^

Question 1

Background

Answer 1

offender inherit specific traits
make them bio predisposed to crime

Question 2

Christiansen

Answer 2

350+ set of twins in Denmark
35% concordance of offender beh in MZ male
13% in DZ male
offender beh checked against police records
inherit the beh and predisposed traits

Question 3

Crowe

Answer 3

adopted kids with mom with criminal record had 50% more risk of having on than the 5% in adoptees with bio mom without a record
There is genetic basis for criminal beh

Question 4

Candidate Gene

Answer 4

Tiihonen et al
analysed 800 offenders in Finland
MAOA & CHD13 associated with violent crimes
5-10% of all crimes in Finland can be linked to the genetypes

Question 5

MAOA

Answer 5

regulates serotonin
can be linked to aggressive beh
can lead to violent crimes

Question 6

CHD13

Answer 6

linked to substance abuse and ADHD
antisocial beh and impulsivity can lead to risk-taking beh

Question 7

Diathesis Stress Model

Answer 7

genetics have a role in criminality
so do envi as it determines offending beh
people may inherit the genes but if raised with poor role models (criminals)
- can make them more accessible to crime

Question 8

Support for Diathesis Stress Model

Answer 8

Mednick et al
studies 13,000 Danish adoptees
13.5% had conviction when neither bio or adopted parents did
20% when either bio or adopted does
24.5% both had

Question 9

Issues With Twin Evidence

Answer 9

researchers disregard envi’s influence on beh
wrongly assume since MZ twins are identical they experience the same envi
Research: the similar they look = the more they are treated the same
high concordance rate for MZ, but it could be due to treatment not genes

Question 10

Nature VS Nurture

Answer 10

adoption studies are a good way to separate them and understand which influences beh
but people have diff circumstances
- adopted at diff age
- still in contact with bio parents so they still influence