fragile X syndrome

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fragile X syndrome

n.
An inherited disorder caused by a defective gene on the X chromosome and marked by intellectual disability, developmental disorders, enlarged testes, and facial abnormalities in males and by mild or no effects in heterozygous females.

fragile X syndrome


n.
a widespread form of mental retardation caused by a faulty gene on the X chromosome.
[1980–85]
References in periodicals archive ?
Though you've probably never heard of it, fragile X is the most common heritable form of intellectual disability.
Girls and women affected by fragile X experience more varied symptoms, because their other X chromosome provides some protection.
With these benefits of early diagnosis in mind, Donald Bailey of the Research Triangle Institute recently spearheaded one of the largest epidemiological studies of fragile X ever performed.