Childen's Hospital Boston
International Visitorsdotted lineRequest Appointmentdotted lineDirections
 advanced search
About Us Find a Specialist Locations Careers Press Room Giving To
Clinical Services For Patients & Families For Health Professionals Research
My Child Has
or find by letter:  A-F  G-L  M-R  S-Z
My Child Has...
 X
FlowerUniparental Disomy: Prader-Willi Syndrome, Angelman Syndrome
Programs that treat this condition
 Genetics Program  
What is uniparental disomy?
Normally, we inherit one copy of each chromosome pair from our biological mother, and the other copy of the chromosome pair from our biological father. Uniparental disomy refers to the situation in which two copies of a chromosome come from the same parent, instead of one copy coming from the mother and one copy coming from the father. Angelman syndrome and Prader-Willi syndrome are examples of disorders caused by uniparental disomy.
What is Angelman syndrome (AS)?
People with Angelman syndrome (AS) have mental retardation, severe speech problems, stiff arm movements, and a stiff, uncoordinated walk. They may have seizures and often have inappropriate outbursts of laughter. Angelman syndrome results when a baby inherits both copies of chromosome #15 from the father (rather than one from the mother and one from the father).
What is Prader-Willi syndrome (PWS)?
Prader-Willi syndrome (PWS), on the other hand, results when a baby inherits both copies of chromosome #15 from the mother. Babies born with PWS have poor muscle tone and a weak cry. They initially are slow feeders and appear undernourished. The feeding problems improve after infancy and often between 2 to 4 years of age the child becomes obsessed with food and is unable to control their appetite. The overeating often results in rapid weight gain and obesity. Individuals with PWS are mentally retarded and less-than-average adult height.

Consult your physician or genetic counselor for more information regarding uniparental disomies.

 X
Email this page
Printer Friendly
 X
Contact Us Site Map Privacy Accessibility Give Now