47,XYY syndrome legal definition of 47,XYY syndrome
XYY syndrome (redirected from 47,XYY syndrome)
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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.
Collins Dictionary of Law © W.J. Stewart, 2006
References in periodicals archive
Background: The 47,XYY syndrome
could result in fertility problems.
Numerical sex chromosomal abnormalities in males are relatively common with Klinefelter syndrome (47,XXY) and 47,XYY syndrome