For Xyy Syndrome we have terms and definitions in 2 topics. The topics are Genetics and Medical.

Genetic condition in males with extra Y chromosome (in 1 in 1000 male births). Symptoms: tall stature (over 6'), may including sterility, developmental delay, learning problems.
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A disorder in which a man has an extra Y chromosome, causing him to be unusually tall and to have behavioral disorders
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