A member asked:

What causes fragile x syndrome?

A doctor has provided 1 answer

Chromosome defect: Patients with fragile x have a defective x chromosome. There are several variants, and not all cells may be affected. It is full disease only in males, but females can be carriers. It is a genetic disorder, but it often just occurs without warning. Affected boys can vary from normal to severe retardation and autism. There is no cure.

Answered 8/20/2012

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