* Fragile X mental retardation
* Alzheimer's disease (Brain degeneration)
* X-linked bulbo-spinal muscular atrophy
* Myotonic dystrophy (Muscle disorder that later affects other body systems)
* Huntington's disease (Degeneration of the nervous system)
* Ataxia (Lack of muscle coordination)
* Cystic fibrosis (Blockage of airways to the lungs)
* Polycystic kidney disease (Kidney malfunction)
* Tay-Sachs (Fatal degenerative neurological condition in children)
* Heart disease
* Cancers -- colon, breast and ovarian
* Retinitis pigmentosa (Degeneration of retinal pigments leading to blindness)