According to Psychcentral depression, bipolar disorder, ADHD, schizophrenia and autism are traceable to the same inherited genetic variations
According to AsapSCIENCE, depression could be genetic due to a variation in the serotonin transporter gene. Having at least one short seems to give some kind of genetic predisposition to depression.
So what's the analogue of the serotonin transporter gene in ADHD? Is there a dopamine transporter gene?
Double posted on Cognitive Sciences Stackexchange