is parkinson's disease genetic
Genetics and Parkinsonâs Disease. Many people affected by Parkinsonâs disease want to know whether it can be passed down from one generation to the next. Directly inheriting the disease is quite rare. About 10 to 15 percent of all cases of Parkinsonâs are thought to be genetic forms of the disease. The other 85 to 90 percent of cases are classified as idiopathic, meaning the exact cause is unknown.