File:Trisomy21arrow.gif: Revision history

From Embryology

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5 August 2009

27 July 2009

  • curprev 17:1817:18, 27 July 2009MarkHill talk contribs 273 bytes +273 Down syndrome or trisomy 21 is caused by nondisjunction of chromosome 21 in a parent who is chromosomally normal and is one of the most common chromosomal abnormalities in liveborn children. Image Source: UNSW Embryology http://embryology.med.unsw.edu.au