Most fathers who suffer from baldness will pass it on to their sons, but not 100%. The most common form of male pattern baldness is androgenetic alopecia, which is caused by sex hormones and occurs mainly in young and middle-aged men, while some cases are caused by seborrheic alopecia. Androgenetic alopecia is a polygenic disorder, and polygenic and monogenic disorders are different. Polygenic alopecia is caused by a combination of hereditary and environmental factors, so it is not 100% hereditary, but the incidence of the disease is higher than that of men without a family history of the disease.