Sex Chromosomes

The Sex Chromosomes are X and Y. XX is a female and XY is a male. These chromosomes come from the gametes which are an egg and a sperm cell. A sperm cell is either X or Y and an egg is a X. The SRY triggers testis growth in the 8th week of prenatal development and is located on the Y chromosome. All embryos are female until the SRY kicks in. There are many exceptions and dieases linked to these sex chromosomes.