a relatively common genetically inherited abnormality of the X chromosome which results in mental retardation.  Since it is an X-linked trait, males more often have it expressed in their phenotypes.   Most fragile-X males have large testes, big ears, narrow faces, and sensory integration dysfunctions that result in learning disabilities.  It is lik [..]

An inherited condition caused by a ‘fragile’ or broken site on the X chromosome, which can cause mental impairment.

The most common form of inherited mental retardation. Named for its association with an X chromosome with a tip that breaks or appears uncondensed. Inheritance involves imprinting.