Caused by deletion of part of the short arm of chromosome 5
Cat Cry Syndrome (Cri du chat)
Usually caused by an extra copy of chromosome 21
Down’s Syndrome
Caused by an extra copy of chromosome 18
Edwards syndrome
Also called terminal 11q deletion disorders
Jacobsen Syndrome (Paris-Trousseau syndrome)
They are often shy and quiet and higher incidence of speech delay
Klinefelter Syndrome
Female characteristics are present but underdeveloped
Turner Syndrome