Talk:Stevonnie/@comment-25839649-20150123144612/@comment-28584561-20150123151037

Actually, you're a girl if your sex chromosomes follow the combination XX and you're a boy if you're chromosomes follow the XY combinations. If you want to talk genetically, technically you can be both or near to being both sexes, there is a genetic disorder in which individuals are born with an extra X or Y chromosome. Klinefelter Syndrome also known as 47, XXY (normal humans only have 46 chromosomes; 46, XY-male or 46, XX-female). People with Klinefelter Syndrome are considered genetically male but can be phenotypically female, male, or intersex. There is also 47, XXX a female who has an extra X chromosome but is indistunguishable from the other normal females, the same aslo applies to 47, XYY when a male has an extra Y chromosome but is considered normal phenotypically.

Also, the X chromosome is always dominant, as it contains more genes than the Y chromosome. The sex chromosomes mostly dictates what sex you become and many other chromosomes, remember we have 46, are in charge of many more aspects of a human, including appearance.