Find out about several diseases such as Mad Cow and Creutzfeldt-Jakob, which are examples of diseases caused by prions, or protein infections.

This site explains the X-linked inheritance of Hemophilia and includes a diagram.

Karyotype of a female with Trisomy 13

Photograph compares hand of normal individual with hand of Marfan Syndrome patient.

Photographs of deformed frogs discovered in the wild and held in captivity from 1997 - 2006. Each picture has a brief explanation of the deformity.