This document discusses gender development from biological and social perspectives. It defines sex as biologically determined sexual anatomy, while gender is culturally determined and refers to one's sense of masculinity or femininity. Gender identity develops through childhood as children learn appropriate gender roles and schemas. Theories discussed include Freud's psychosexual stages, Kohlberg's cognitive gender theory, and Bem's sex-role inventory. Conditions like Klinefelter syndrome and complete androgen insensitivity syndrome are also examined in relation to gender development. The document analyzes how gender stereotypes form and influence relationships and privileges.