What sort of disorder is having a fraxa (fragile x) mutation?

Chrms dfct > on male. Fragile x is a term used for a fragile site(non-staining gap) on the long arm of the x when chms are studied. Since males have only one x, the defective one influences outcome, with mental deficiencies altered physical features.The kids mother has 2 x's, 1 fragile & 1 nl & usually the nl one prevents problems but not always.This is a male dominated form of significant mental deficiency.
Mental retardation. Fragile x syndrome is the most common inherited form of mentardation and accounts for 6% of mental retardation in male.