Klienfeltor syndrome is a chromosome condition that affects male development. 47, XXY when someone has two X and one Y chromosome. Normally Males have an X and a Y chromosome, and females normally have two X chromosomes. People with Klinefeltor syndrome normally have two extra sex chromosomes in each cell. Klienfeltor syndrome affects one in 500 to 1,000 newborn males. Klinefeltor syndrome is under diagnosed because the condition is not identified in people with mild symptoms and signs. This condition also crosses over with other conditions. Klinefeltor syndrome cannot be inherited the chromosome changes usually occur as random events during the formation of reproductive cells in a parent.
Nondisjunction is usually the cause of XXY,