XYY syndrome, also known as Jacobs syndrome, is an aneuploid genetic condition in which a male has an extra Y chromosome. There are usually few symptoms...

cases. The presentation of the syndrome is heterogeneous, but appears to be more severe than its counterpart XYY syndrome. Common traits include borderline...

were found to have an extra Y chromosome, the XYY syndrome. Jacobs hypothesized that men with XYY syndrome are more prone to aggressive and violent behavior...

Intersex Taurodontism Trisomy X Turner syndrome XYY syndrome XXYY syndrome "What are common symptoms of Klinefelter syndrome (KS)?". Eunice Kennedy Shriver National...

stature in Turner syndrome and its counterpoint, tall stature in sex chromosome polysomy conditions such as Klinefelter syndrome, XYY syndrome, and trisomy...

syndrome in 1960, and XYY and tetrasomy X in 1961. The 49,XXXYY karyotype was not reported again until 1974, highlighting the rarity of the syndrome....

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

trisomy X and Turner syndrome in Denmark Violin plots of age at diagnosis for Klinefelter syndrome, trisomy X, and XYY syndrome The first known case of...

Down syndrome or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome...

males are born two Xs and a Y ("XXY", see Klinefelter syndrome), one X and two Ys (see XYY syndrome). Some females have three Xs (Trisomy X), and some have...