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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