Genetics as it applies to evolution, molecular biology, and medical aspects.
Is an individual having XYY possible?
In my oppinion, it isn't possible as a male only has one Y, and if this failed to seperate it can only result in XXY. Having XYY would only be possible if an abnormal sperm (XY) fertilises another sperm (Y).
No XYY is very well possible; even XYYY or XYYYY is possible. Double YY is in fact linked to slight mental retardation and agressive behaviour, about 2-3% of men inside prisons display double YY on their karyotype. Hope this answers your question.
i'll look it up what is the cause of this so called 'supermale'.
this perfectly viable, since there are not many genes on the Y-chromosome. So there is no genetic imbalance of the autosomal genes. Most of these males are infertile.
Take a look of this. It may be helful
http://www.ncbi.nlm.nih.gov/entrez/quer ... .3080#3097
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