XXY, also known as Klinefelter syndrome, is a genetic condition that occurs in males when they have an extra X chromosome, resulting in a total of 47 chromosomes instead of the typical 46. This additional chromosome can lead to various physical and developmental traits, such as taller stature, reduced muscle mass, and potential fertility issues. Individuals with XXY may also experience learning difficulties and social challenges, although many lead healthy and productive lives. Early diagnosis and intervention, including hormone therapy and educational support, can help manage symptoms and improve quality of life for those affected by this condition.