It's the old saying, "A woman can't teach a boy how to be a man and a man can't teach a girl how to be a woman." However in reality single parents often do succeed in rasing children of the opposite sex. Oprah credits her dad with turning her life around. (one example)
Providing for a child, setting moral standards, offering guidence in life, helping them develop self-esteem, loving and supporting them are all the really important things both boys and girls require. Hair styles, fashions, ways to approach conversations about periods and sex can be learned. One of the best gifts a father can give a daughter is teaching her how (men) really think. How to tell a "good man" from a "bad boy". Just as a mother can help her son stay away from women out to "use" men to access whatever they have of value.
Men see things in other men and women see things in other women that neither sex can quickly identify in their opposites.