For years I've been patting myself on the back for having a dad with a full head of hair. My thinking was that my sons (if I had them) would inherit my good genes. Trust me, there are plenty of bad genes in my family (cancer! Heart disease! Juvenile diabetes! Alzheimer's!) so I was banking on the full head of hair thing. But turns out the whole baldness-comes-from-the-mother's-side idea is just a myth.
Yes, baldness is inherited, but it's a mix of both parents' genes. And just because someone in the family is bald doesn't mean every kid he has will be. My husband shaves his head because he's balding. His Dad is bald. But he has 2 brothers and one is balding and the other is not. Go figure.