Is there a ‘gene’ for addiction?

• What did Ojelade et Al (2015) discover about the Rsu1 gene?

  • malfunctioning Rsu1 gene in fruit flies reduced alcohol sensitivity, and brain imaging in humans linked it to alcohol dependence
• Why is addiction considered polygenic?

  • many genes, such as DRD2, ADH, and Rsu1, contribute to addiction risk, making it complex rather than being caused by a single gene