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Well there is actually several. There is XXY, Klinefelter: XYY, "Super male": XXX, perfectly normal but still a abnormality: and XO or Turner syndrome, sterile female, small stature, normal intelligence. These are the most well documented but I am sure there is more out there.

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13y ago
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15y ago

Downsyndrome

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Q: What is the chromosomal abnormality in the 23th chromosome?
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