Klinefelter syndrome

(redirected from XYY syndrome)
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Related to XYY syndrome: XXY syndrome, Turner syndrome
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Noun1.Klinefelter syndrome - syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation; a genetic defect in which an extra X chromosome (XXY) is present in the male
syndrome - a pattern of symptoms indicative of some disease
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References in periodicals archive ?
Thus, SHOX haploinsufficiency is associated with short stature (as seen with Turner syndrome), and additional SHOX genes (as seen with sex-chromosome polyploidies such as Klinefelter syndrome, triple X syndrome, and XYY syndrome) are associated with tall stature [5].
citations, eg, unknowns, and the x,y,z Cartesian coordinate system), then XYY (24.7, Chambers, XYY syndrome, a sex chromosome number abnormality).