What type of genetic disorder is klinefelter syndrome classified as?

Chromosomal disorder. Klinefelter syndrome is also known as XXY condition. Men with this condtion have an extra x chromosome in most of their cells. Not all men with the condition have all of the symptoms described by klinefelter and many are not even aware that they have the condition. 1 in 500 men are xxy. During puberty, most males with the condition are taller with less muscular bodies and less facial hair.