Fragile X males with normal intelligence? And if so, why?

This publication has 9 references indexed in Scilit:

• Fragile X trait in a large kindred: transmission also through normal males.
  Journal of Medical Genetics, 1983
• Fragile X chromosome: clinical and cytogenetic studies on cases from seven families.
  Journal of Medical Genetics, 1983
• The fragile X chromosome in a large Indian kindred
  Clinical Genetics, 1983
• Marker X syndrome in an oriental family with probable transmission by a normal male
  American Journal of Medical Genetics, 1982
• IS THE FRAGILE X SYNDROME AMENABLE TO TREATMENT?
  The Lancet, 1982
• TRANSMISSION OF FRAGILE (X) (q27) SITE FROM A MALE
  The Lancet, 1981
• X-Linked mental retardation with fragile X. a pedigree showing transmission by apparently unaffected males and partial expression in female carriers
  Human Genetics, 1981
• FRAGILE X IN A NORMAL MALE: A CAUTIONARY TALE
  The Lancet, 1981
• X‐linked mental retardation: A study of 7 families
  American Journal of Medical Genetics, 1980