What is the differences between sex and gender?
Sex is either male or female, and gender is either masculine or feminine. In other words, sex is refered to biological differences, hormones, and internal and external sex organs. Whereas gender describes the characteristics that a society or culture expresses  as masculine or feminine. There is a clear formula demonstrating the explanation given above on the website from Monash University: http://www.med.monash.edu.au/gendermed/sexandgender.html

Nobelius, Anne-Maree. "What is the difference between sex and gender?." n. pag. Web. 23 Jun 2004. <http://www.med.monash.edu.au/gendermed/sexandgender.html>.