"XY" refers to a specific genetic configuration found in many male organisms, including humans. In this system, the X chromosome and the Y chromosome determine male biological characteristics. The presence of the Y chromosome typically leads to the development of male physical traits and reproductive systems. In contrast, females usually have two X chromosomes, designated as XX. The XY configuration plays a crucial role in sex determination during the early stages of embryonic development. This genetic framework is fundamental to understanding human biology and reproduction.