Is ADHD inherited from Mom or Dad? You can inherit genes that boost risk for ADHD from your mother, from your father or from both parents. In a recent Norwegian study, inherited risk was somewhat higher when a child's mother had ADHD compared to their father, but researchers weren't certain why that would be.

Many kids who have a parent with ADHD don't develop ADHD themselves. And kids can have ADHD without having any family risk. Other non-genetic factors can be involved. Knowing that ADHD is genetic can be helpful in many ways.

Less commonly, ADHD is caused by rare gene mutations or chromosome abnormalities. In these instances, ADHD is usually one of several features of a syndrome that affects multiple parts of the body. In most individuals with ADHD caused by rare gene mutations, a mutation in a single gene is enough to cause the disorder.

Some families demonstrate transmission of ADHD in a pattern consistent with that of a Mendelian dominant trait.