Genetic and Rare Diseases Information Center (GARD)


Other names people use for this condition
  • Marker X syndrome
  • Martin-Bell syndrome
  • FRAXA syndrome
  • Fra(X) syndrome
  • FXS
  • X-linked mental retardation and macroorchidism

Fragile X syndrome
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Fragile X syndrome is a genetic condition involving changes in part of the X chromosome.[1] This condition causes a range of developmental problems including learning disabilities and cognitive impairment.[2] It is the most common form of inherited mental retardation in males and a significant cause of mental retardation in females.[1]  Fragile X syndrome is caused by a change in the FMR1 gene.[1][2] Fragile X syndrome is inherited in an X-linked dominant pattern.[2]

References
  1. Haldeman-Englert C. Fragile X syndrome. MedlinePlus. 2007 Available at: http://www.nlm.nih.gov/medlineplus/ency/article/001668.htm. Accessed April 20, 2009.
  2. Fragile X syndrome. Genetics Home Reference (GHR). 2007 Available at: http://www.ghr.nlm.nih.gov/condition=fragilexsyndrome. Accessed April 20, 2009.

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