Klinefelter 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
Klinefelter's syndrome, XXY-syndrome
syndrome - a pattern of symptoms indicative of some disease
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References in periodicals archive
The 47, XYY syndrome is characterized by an extra Y chromosome in a man's cells.
Outcomes of Preimplantation Genetic Diagnosis Cycles by Fluorescent In situ Hybridization of Infertile Males with Nonmosaic 47,XYY Syndrome
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].
Short Stature Homeobox-Containing Haploinsufficiency in Seven Siblings with Short Stature
citations, eg, unknowns, and the x,y,z Cartesian coordinate system), then XYY (24.7, Chambers, XYY syndrome, a sex chromosome number abnormality).
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