A gender when thought as the normal for centuries is that sex you were assigned at birth, male or female (Which are the only assigned sex).
A gender is, a concept which was developed in the 1970s, not biologically determined but defined from society norms and roles, male and female sex characteristics.
Genders: (New Gender Concept)
Male
Female Non-Binary <- An umbrella term consisting of every trans gender.
Non-Binary:
Genderfluid
Bigender
A lot more.
"What gender are you?"
- "Non Binary"
"You aren't of the male and female gender binary?"
- "Yes"