XXYY syndrome is a sex chromosome anomaly in which males have 2 extra chromosomes, one X and one Y chromosome. Human cells usually contain two sex chromosomes...

others. Those with XXXY syndrome tend to display less externalizing and internalizing behaviors compared to those with 48,XXYY syndrome, which may have a positive...

problems are typical. One study looked at males that were diagnosed with 48,XXYY, 48,XXXY and 49,XXXXY. They found that males with 48,XXXY and 49,XXXXY function...

extra Y chromosome. Klinefelter syndrome XXYY syndrome XYYY syndrome XYYYY syndrome Turner syndrome Trisomy X "47,XYY syndrome". Genetics Home Reference. January...

Down syndrome (United States) or Down's syndrome (United Kingdom and other English-speaking nations), also known as trisomy 21, is a genetic disorder...

gametes. XXXYY syndrome, by its nature, requires multiple steps of nondisjunction. Possible causes include fertilization of a normal egg by an XXYY sperm, fertilization...

Lange syndrome Orofaciodigital syndrome 1 13q deletion syndrome XXYY syndrome Silver–Russell syndrome Andersen-Tawil syndrome Noonan syndrome Ehlers–Danlos...

Turner syndrome (TS), also known as 45,X, or 45,X0, is a genetic disorder in which a person's cells have only one X chromosome or are partially missing...

XXXY syndrome XXYY syndrome XY gonadal dysgenesis XYY syndrome Yellow nail syndrome Yemenite deaf-blind hypopigmentation syndrome Yentl syndrome Yim–Ebbin...

discovered, being preceded by Turner, Klinefelter, and trisomy X in 1959, XXYY syndrome in 1960, and XYY and tetrasomy X in 1961. By the time of Linden, Bender...