 "who" and "he" for "brother" but "which" and "it" or "she" for "cow".Used primarily in sociology and gender studies, ""doing gender"" is the socially constructed performance which takes place during routine human interactions, rather than as a set of essentialized qualities based on one's biological sex.The term first appeared in Candace West and Don Zimmerman’s article “Doing Gender”, published in the peer-reviewed journal, "Gender and Society".