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21 Monosomy in a retarded female infant
  1. Katherine H. Halloran,
  2. W. Roy Breg,
  3. Maurice J. Mahoney
  1. Department of Human Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA
  2. Department of Pediatrics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA

    Abstract

    A 20-month-old female infant with complete monosomy 21 is described. She has marked mental and physical retardation, antimongoloid slant, low set ears, micrognathia, syndactyly of the toes, and cardiac abnormalities. Karyotypes of fibroblasts and lymphocytes, examined with Giemsa banding, quinacrine banding, and reversed banding techniques revealed no evidence of translocation.

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    Footnotes

    • * Supported in part by a grant from the Joseph P. Kennedy, Jr Foundation and USPHS Grants HD-00339, AM-12579 and HD-00198.

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