It has been suggested that Martin-Bell syndrome be merged into this article or section. (Discuss) Fragile X Syndrome is the most common inherited cause of genetic mental retardation and is associated with autism. Causes X-linked recessive inheritance The fragile X syndrome is a genetic disorder caused by mutation of the FMR1 gene on the X chromosome. Mutation at that site is found in 1 out of about every 4000 males and 1 out of about every 6000 females. Normally, the FMR1 gene con ...
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Facts About Fragile X Syndrome
... Introduction Fragile X syndrome is the most common genetically-inherited form of mental retardation currently known. In addition to intellectual disability, some individuals with Fragile X display com...
Source: Cleveland Clinic

Fragile X syndrome
... Fragile X syndrome is a genetic condition that causes a range of developmental problems including learning disabilities and mental retardation. Usually males are more severely affected by this disorde...
Source: Genetics Home Reference