Biological Explanation - Gene

Question 1

Role of gene

Answer 1

DRD2 gene A1 variant
-have fewer dopamine receptor = less pleasure from everyday live
-try to compensate for under active nervous system with overstimulation - more likely to become add it as overindulge
- build more tolerance = harder to come back form withdrawal

Comings et al - 48.7% smoker + ex carry A1 variant, 25.9% general population
50.9% gamblers has, 25.9% non-addicts

Question 2

Evaluation- ethical issue

Answer 2

May use genetic as excuse for addiction + continue
-psychological harm if told more likely to be addict + feel less empowered to change

If in court for drug crime
-more likely to be not trusted if have gene
-those who does not can get away or do drug crime (sell)