A gene variant that,when homozygous,may be common to people with addictions to different substances is
A) the CFTR allele that also causes cystic fibrosis.
B) the serotonin transporter A5.
C) the A1 allele of the dopamine D(2) receptor.
D) the dopamine transporter B3.
E) the LSD reuptake inhibitor C5.

Question

Quizplus · Accepted Answer

The A1 allele of the dopamine D(2) receptor is a gene variant that, when homozygous, has been associated with addictive behaviors involving alcohol, cocaine, and opioids. This gene variant may affect the brain's reward system and contribute to the development of addiction. The other options listed do not have strong evidence linking them to addictive behaviors.

A Gene Variant That,when Homozygous,may Be Common to People with Addictions