XYY syndrome

(redirected from Klinefelter syndrome)
Also found in: Dictionary, Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
Related to Klinefelter syndrome: Turner syndrome, cri-du-chat syndrome

XYY syndrome

the theory that a man with an extra Y-chromosome is predisposed towards violence and aggression and hence the basis, usually unsuccessful, for a defence argument.
References in periodicals archive ?
Men with Klinefelter syndrome are almost all infertile.
While mental retardation is observed rarely in Klinefelter syndrome, 26% of the subjects with 48,XXYY syndrome have mental retardation and almost all have learning difficulty.
Data Source: A randomized trial in 80 boys with Klinefelter syndrome.
However, physical examination was not consistent with the features of Klinefelter syndrome, and the cytogenetic evaluation of his peripheral blood showed a normal karyotype.
Sperm aneuploidy in fathers of children with paternally and maternally inherited Klinefelter syndrome.
Klinefelter syndrome occurs when a man is born with 2 or more X chromosomes.
For a more complete explanation of the role this extra chromosome plays, see the accompanying section, "Chromosomes and Klinefelter syndrome.
Men with the XXY condition, also called Klinefelter syndrome, show a disorder in language function but have normal spatial abilities, says Charles Netley of Toronto's Hospital for Sick Children.
It is the first non-invasive prenatal test that offers the option to include evaluation of sex chromosome aneuploidies, such as Turner syndrome (Monosomy X), Triple X (XXX), Klinefelter syndrome (XXY) and Jacobs syndrome (XYY) - the most common fetal sex chromosome abnormalities.
Klinefelter syndrome (KS), 47XXY, is the most frequent sex chromosome aberration in males, affecting 1 in 660 newborn boys.
NATIONAL RESOURCES FOR SPECIFIC DISABILITIES, KLINEFELTER SYNDROME 49 XXXXY SYNDROME ASSOCIATION