Klinefelter's Syndrome
Klinefelter's Syndrome is a chromosome disorder named after the scientist who first reported it, Dr. Harry Klinefelter. A chromosome disorder is, obviously, an abnormality in the chromosomes of an organism. Klinefelter's is a specific disorder in which there is an extra X chromosome in an already full set of sex chromosomes (XY), so this is a trisomy of the sex chromosomes.
A trisomy is an addition of an extra chromosome.
A trisomy is an addition of an extra chromosome.
A karyotype showing the chromosomes of a person with Kleinfelter's Syndrome.