Depends on your dfn: Significant impairment (iq<70) in FAS is felt to represent 1/3600 of the population, mostly male. A lesser form of involvement with lesser alterations in this gene (add, behavior issues) may affect 1/130-250 female & 1/250-800 males. See: www.Ncbi.Nlm.Nih.Gov/pmc/articles/pmc2888470/?Tool=pmcentrez.
Answered 1/12/2015
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