what is the chromosome abnormality in klinefelter's syndrome
Klinefelter Syndrome is a chromosome abnormality that affects only boys/men. People with Klinefelter are born with at least one extra X chromosome. The male with Klinefelter will be born with 47 chromosomes in each cell, rather than the normal number of 46. Some Klinefelter patients have 48, 49, or 50 chromosomes.