Klinefelter syndrome, 47, XXY, or XXY syndrome is a genetic disorder where people have an extra number of X chromosomes. People who have Klinefelter's Syndrome are often called "XXY Males", or "47, XXY Males".[dead link]
Effects[change | change source]
In other organisms[change | change source]
Other males can have Klinefelter's Syndrome as well as humans. The mouse is one example. Tortoiseshell or calico markings on male cats are an indicator of a similar syndrome. These cats are considered to be the model organism for Klinefelter syndrome, because the gene for a cat's tabby coat markings is found on the X chromosome. 
References[change | change source]
- Cotran, Ramzi S.; Kumar, Vinay; Fausto, Nelson; Nelso Fausto; Robbins, Stanley L.; Abbas, Abul K. (2005). Robbins and Cotran pathologic basis of disease. St. Louis, Mo: Elsevier Saunders. p. 179. ISBN 0-7216-0187-1.CS1 maint: multiple names: authors list (link)
- Bock, Robert (1993). "Understanding Klinefelter Syndrome: A Guide for XXY Males and their Families" (HTML). NIH Pub. No. 93-3202. Office of Research Reporting, NICHD. Retrieved 2007-04-07.
- Denschlag, Dominik, MD; Clemens, Tempfer, MD; Kunze, Myriam, MD; Wolff, Gerhard, MD; Keck, Christoph, MD (October 2004). "Assisted reproductive techniques in patients with Klinefelter syndrome: A critical review". Fertility and Sterility 82 (4): 775–779. doi:10.1016/j.fertnstert.2003.09.085. PMID 15482743
- Russell, Liane Brauch (9 June 1961). "Genetics of Mammalian Sex Chromosomes MOUSE STUDIES THROW LIGHT ON THE FUNCTIONS AND ON THE OCCASIONALLY ABERRANT BEHAVIOR OF SEX CHROMOSOMES". Science 133 (3467): 1795-1803. doi:10.1126/science.133.3467.1795
- Centerwall WR, Benirschke K (1975). "An animal model for the XXY Klinefelter's syndrome in man: Tortoiseshell and calico male cats". American Journal of Veterinary Research 36 (9): 1275–1280. PMID 1163864.
Other websites[change | change source]
- "Klinefelter Syndrome at the Open Directory Project". dmoz.org. Retrieved 27 July 2010.