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Fragile X syndrome

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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 than females.

Changes in the FMR1 gene result in fragile X. Nearly all cases are due a repeated DNA fragment with the gene becoming much longer (‘expanded’) than the general population.

Definition from Genetics Home Reference, US National Library of Medicine: Fragile X

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