Klinefelter syndrome is a genetic condition that affects males, caused by the presence of an extra X chromosome, resulting in a 47,XXY chromosome pattern. This additional chromosome can lead to various physical and developmental traits, such as taller stature, reduced muscle mass, and delayed puberty. Individuals with Klinefelter syndrome may also experience fertility issues and may have learning difficulties. Early diagnosis and treatment, including hormone therapy and educational support, can help manage symptoms and improve quality of life for those affected by this condition.