This attention was the result of feminists in particular pointing out that gender is an important social division which, up to that time, had been taken for granted. Differences between men and women were assumed somehow to be the consequence of biology, and as a result, the role of gender in framing social activity was minimized. In other words, gender was assumed to be a social constant. This was because while it is true everywhere there is male and female, it is not true that everywhere males and females have the same social roles within a society. Thus, while it is true that women everywhere have a relation to men, it is not true that this relationship is necessarily the same.
Sociologists are careful to separate sex form gender.
Refers to biological condition you have from birth. You are male or female due to X or Y chromosome. What we look like without our clothes. There are two sexes. Complex of culturally legitimated behaviors and beliefs associated with being of one sex of the other.