哈哈，不能全怪妈，有时也是爹的错

Myth: Hair loss is passed down from your mother's side.

Not entirely true. While the primary baldness gene is on the X chromosome, which men get only from their mothers, other factors are also in play. The hereditary factor is slightly more dominant on the woman's side, but research suggests that men who have a bald father are more likely to develop male pattern baldness than those who don't.

http://health.usnews.com/health-news/family-health/mens-health/articles/2011/02/22/what-causes-hair-loss-9-myths-about-baldness