Medical Genetics Outline Overview and concepts. Down syndrome, Trisomy 18, Trisomy 13. The sex chromosomes and their abnormalities: Klinefelter syndrome, Turner syndrome, 47,XYY, Poly X syndrome, Hermaphroditism. This document is produced by trial version of Print2Flash.Visit www.print2flash.com for more informationThis document is produced by trial version of Print2Flash. Visit www.print2flash.com for more information