Is there a hereditary component to tourette's syndrome?

Yes. The gene has not yet been identified, so mode of transmission is also unknown. Fathers usually have a history of tourette's or undiagnosed chronic tics, anxiety with features of OCD & adhd. Mothers may have a history of anxiety/ocd & adhd without tics because of partial penetrance of the gene. Because it can come from either parent, researchers look at autosomes, not the sex chromosomes.