If you have one or more “Y” chromosomes, then you are a male.
* A normal male has an “XY” chromosome pair.
* A male with Klinefelter’s Syndrome has “XXY.”
* A male with Supermale Syndrome has “XYY.”
If you have no “Y” chromosomes, then you are a female.
* A normal female has an “XX” chromosome pair.
* A female with Turner’s Syndrome has one “X.”
* There are females known as XY-females, but these are really biological males who had suffered an “unfortunate” injury while in the womb or during birth and were raised as females.
There may be other combinations that I am not aware of, but it is the presence or absence of a “Y” chromosome that determines whether you are male or female.
However, these syndromes are extremely rare; and those who were born with them generally have physical deformities. Therefore, if you were born a healthy male, you can safely assume that you have an XY chromosome pair; and if you were born a healthy female, then you can safely assume that you have an XX chromosome pair.