"Gender binary". From the Latin genus, -eris, class, and binarius, two-element. Classic concept of "gender" with scientific-biological and sociocultural bases that defines it as composed of two categories: male and female, characteristic of male and female. Gender is an intrinsic condition of human nature, determined from the conception of the individual in the womb, XY (male) and XX (female) chromosomes. Male or female hormones play a determining role in the body and behavioral development of males and females. Distinguish the word "gender" from each person's sexual tastes or preferences.