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Name: Betty A Laliberte
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Question:
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?



Replies:
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.

-ProfBill



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