A 49-year-old member asked:
what exactly is xyy syndrome or disease?
1 doctor answer
Dr. Ed Friedlander answered
43 years experience Pathology
Usually non-problem: This is a man with an extra y chromosome. These men tend to be tall and to have more troubles with acne than others. A junk-science paper and a false claim by murderer richard speck popularized the myth that these men tend to criminality. If there are no health problems, xyy almost never gets discovered except by prenatal screening; in the latter case it usually causes no troubles.
Answered on Mar 30, 2014
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