XYY syndrome is a chromosome disorder that affects males. Males with this disorder have an extra Y chromosome. The XYY syndrome was previously considered the "supermale" syndrome where men with this condition were thought to be overly aggressive and...

The XYY karyotype was first described in a 1965 study of 197 males in a Scottish maximum-security prison. The study's findings indicated that 4.5% of the violent offenders studied had the XYY karyotype. Subsequent surveys by other researchers indicated...

A very rare chromosome abnormality (see CHROMOSOME ABNORMALITIES) in which a male has an extra Y chromosome. It has been rather sensationally associated with criminality, but there is now considerable doubt as to the validity of this controversial...

XYY syndrome is an aneuploidy (specifically a trisomy) of the sex chromosomes in which a human male receives an extra Y chromosome, producing a 47,XYY karyotype. Some medical geneticists question whether the term "syndrome" is appropriate for this...

Rage is all the rage now. Society has found the perfect buzzword for what in another culture and time would simply be called rudeness. But the American propensity to psychoanalyze itself and explain aberrant behavior by affixing a label to it has added the...

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