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Name: Betty A Laliberte
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Advanced Placement Biology students are looking for information on XXX chromosome abnormalities and Xyy chromosome abnormalities. Looking for prevalence, causes, treatment, prognosis. Can anyone give us information?

XYY karyotype individuals are phenotypically normal fertile males. The term syndrome isn't even used (hence "karyotype") because the symptoms are usually mild: tallness and acne. There was a belief that XYY individuals had certain criminal tendencies, but there has been NO evidence for this.


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