Definition of XYY syndrome
XYY syndrome: A chromosomal disorder that affects males only, caused by the presence of an extra Y chromosome. Symptoms may include increased height, speech delays, learning disabilities, mild to moderate mental retardation, and behavioral disturbance. Also known as polysomy Y syndrome.Source: MedTerms™ Medical Dictionary
Last Editorial Review: 4/27/2011 5:27:15 PM
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