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  • Title: Chromosomal aberrations in the mildly mentally retarded.
    Author: Göstason R, Wahlström J, Johannisson T, Holmqvist D.
    Journal: J Ment Defic Res; 1991 Jun; 35 ( Pt 3)():240-6. PubMed ID: 1833552.
    Abstract:
    Chromosome analyses were performed on 52 mildly mentally retarded adults and a control group representing the non-retarded population. Chromosomal aberrations were found in 19.2% of the mentally retarded and in 1.9% of the controls. The aberrations in the retarded group consisted of trisomy 21, fragile-X, sex-chromosome aberrations and balanced translocations. The index group included a man with a fragile site Xp22.1. The aberration in the control group consisted of a karyotype with an extra marker chromosome.
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