<Tr> <Td_colspan="2"> 47, XXY karyotype </Td> </Tr> <Tr> <Th> Pronunciation </Th> <Td> <Ul> <Li> / ˈklaɪnfɛltər / </Li> </Ul> </Td> </Tr> <Ul> <Li> / ˈklaɪnfɛltər / </Li> </Ul> <Li> / ˈklaɪnfɛltər / </Li>

Klinefelter's syndrome is caused by a nondisjunction resulting in a genotype of