Risk factor: genetics

Question 1

Comings et al

Answer 1

• pathological gamblers may inherit a faulty A1 DRD2 gene`

Question 2

Blum et al

Answer 2

• reward deficiency syndrome
• in a sample, 69% of alcohol dependent users and 51% of cocaine dependent users had the genetic variant

Question 3

Shields et al

Answer 3

• examined concordance rate between 42 twin pairs that were reared apart
• only 9 pairs were actually discordant