The biological consensus that is based on the "XY Sex Determination System" that states; The sex/gender of an individual is determined by a pair of sex chromosomes (gonosomes). Females typically have two of the same kind of sex chromosome (XX), and are called the homogametic sex. Males typically have two distinct sex chromosomes (XY), and are called the heterogametic sex. Note there is no other possible way of there being more or less then this amount of genders.
If i had a a dollar for every ge i nder there was, i would have two dollars. (You would only have a dollar for every gender resulting in two dollars which means there are only 2 genders)
by Cant Stump The Trump April 24, 2017