The Y chromosome is one of the two sex chromosomes in humans, the other being the X chromosome. It is typically found in males, who have one Y chromosome and one X chromosome, while females have two X chromosomes. The Y chromosome plays a crucial role in determining male sex characteristics and is responsible for the development of male reproductive organs. The Y chromosome contains genes that are essential for sperm production and male fertility. One of the most important genes on the Y chromosome is the SRY gene, which triggers the formation of testes and the production of male hormones. This genetic information is passed from father to son, making the Y chromosome a key element in understanding inheritance patterns in males.