xyy syndromeglossary / XYY SYNDROME XYY syndrome. The abnormal presence of an extra Y chromosome in a male, theoretically resulting in increased aggressiveness and antisocial behavior often resulting in criminal conduct. 词条贡献者 资深法律翻译Patrick,毕业于美国顶尖的高级翻译学院,专注翻译各类与资产管理有关的法律文件。