Category:Sex differences in humans
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Sex differences in humans. In humans, biological sex consists of five factors present at birth: the presence or absence of the SRY gene (an intronless sex-determining gene on the Y chromosome), the type of gonads, the sex hormones, the internal reproductive anatomy (such as the uterus), and the external genitalia.Knox, David; Schacht, Caroline. [https://books.google.com/books?id=iVOXAp27iQkC&pg=PT64 Choices in Relationships: An Introduction to Marriage and the Family]. 11 ed. Cengage Learning; 2011-10-10 [cited 17 June 2013]. {{ISBN|9781111833220}}. p. 64–66.