<Tr> <Th> Frequency </Th> <Td> 1: 500 to 1: 1,000 males </Td> </Tr> <Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> <P> Klinefelter syndrome (KS) also known as 47, XXY or XXY, is the set of symptoms that result from two or more X chromosomes in males . The primary features are sterility and small testicles . Often symptoms may be subtle and many people do not realize they are affected . Sometimes symptoms are more prominent and may include weaker muscles, greater height, poor coordination, less body hair, breast growth, and less interest in sex . Often it is only at puberty that these symptoms are noticed . Intelligence is usually normal; however, reading difficulties and problems with speech are more common . Symptoms are typically more severe if three or more X chromosomes are present . </P> <P> Klinefelter syndrome usually occurs randomly . An older mother may have a slightly increased risk of a child with Klinefelter syndrome . The condition is not typically inherited from one's parents . The underlying mechanisms involves at least one extra X chromosome in addition to a Y chromosome such that there is a total of 47 or more chromosomes rather than the usual 46 . KS is diagnosed by the genetic test known as a karyotype . </P>

What phenotype is associated with the genotype 47 xxy