cri du chat 5P
microcephaly severe/profound LD
angel man 15Q
maternally derived
LD, ataxia, paroxysm of laughter
Prader Willi 15Q
paternally derived
LD, over eating, self injurious behaviour
velo cardiofacial syndrome 22Q
50% have LD, increased risk of schiz
williams syn
7Q
1/7500
turners
45, XO
klinefelters
XXY
defects that cause severe LD
protein - phenylketonuria
carbohydrate - mucopolysacchrridoses
lipid metab - neurolipidoses