What's that, Star?

Star Jones, on her show yesterday, was interviewing some expert on Britney Spears. (Other than not wishing bad things for anyone, I don't much care what happens to the spoiled brat.) This expert theorized that Britney is suffering from bipolar disorder. Star's erudite response: "Isn't there an element of hereditariness to bipolar disorder?" Say, Star, is that the same thing as heredity?