ABSTRACT
Parents, however, vary, and growing up is still an unpredictable and unexplainable process. Gender identity itself is complicated by the fact that a person can visualize himself or herself in a number of different gender roles, some of which society classifies as abnormal or deviant. Gender identity affects the gender role that is the overt behavior that a person plays in society. Usually in most people sex, gender, gender identity, and gender role are synonymous or compatible, but in others they are at variance, and this variance is believed by some to be a possible causal explanation for homosexuality, transvestism, and transsexualism. One of the most dramatic cases of cultural influence on gender attributes was that of two identical twin boys, reported by John Money and Anke A. Ehrhardt. Much of the research on gender identity has also served to emphasize that biological sex is not as definitive as it once seemed.
