Medline
http://www.nlm.nih.gov/medlineplus/geneticdisorders.html
Genetic Science Learning Center
http://gslc.genetics.utah.edu/units/disorders/whataregd/
Medical Genetics
http://www.kumc.edu/gec/support/
New York Genetics
http://www.noah-health.org/en/genetic/
Human Genome Project
http://www.ornl.gov/sci/techresources/Human_Genome/medicine/assist.shtml
