XYY Syndrome (Jacobs syndrome)
The XYY Syndrome (Jacobs syndrome) results from a genetic abnormality which occurs due to the presence of an extra copy of Y chromosome in the male child.
The usual symptoms associated with XYY syndrome include language difficulties and lower intelligence quotient. Learning disabilities, attention deficit disorder, behavioral problems, and hyperactivity, are also common. The affected boys usually grow tall.
Earlier, criminal behavior and aggressiveness were considered to be typical of men with XYY syndrome, but such link has been found to be absent.
Share and Enjoy

Yasser Elnahas
MD, PHD, Professor Of CardioVascular Surgery
Dr. Yasser Elnahas, Is an associate Professor of Cardiovascular Surgery. Dr. Elnahas was trained as a fellow At Texas Heart Institute And Mayo Clinic Foundation.Dr. Elnahas is dedicated to educating the general public about different disease conditions and simplifying the medical knowledge in an easy to understand terminology.

Latest posts by Yasser Elnahas (see all)
- Acute Pericarditis - March 31, 2014
- What is a Pericardial Disease - March 30, 2014
- Infective Endocarditis (Acute and Subacute Bacterial Endocarditis) - March 29, 2014
- Sinus Node Dysfunction - March 26, 2014
- Bundle Branch Block - March 26, 2014