Humans have two kinds of sex chromosomes, an x and a y. The mix of chromosomes you have plays a big part in determining how you will develop. People usually have two sex chromosomes.

These determine whether an individual develops as male or female. Among these sex chromosomes, there Ò€¦ In the xx/xy system, karyotypic females usually have two x chromosomes (xx), while karyotypic males usually have a single x and a single y chromosome (xy). What is the difference between xx and xy in humans? The xx chromosomes are seen in women and xy chromosomes are seen in men.

The xx chromosomes are seen in women and xy chromosomes are seen in men.