Sex polysomies

Normal human karyotype
Some people have genetic differences they don't even know about, and it could be a sex polysomy. Sex polysomies are the presence of more than two sex chromosomes in an individual’s genome. The normal genotypes are 46XX, female and 46XY, male. Individuals with polysomy can have genotypes of 47XXY, 47XXX, 47XYY, or even 48XXXY, 48XYYY or 49XXXXY. Just like with other chromosomes, the presence of extra sex chromosomes results in anatomical abnormalities, such as abnormalities in the genitalia and secondary sex characteristics, mental deficiencies, and cardiac or skeletal anomalies, though some may be so subtle they are not noticed.

Read more about the effects of sex polysomies on anatomy.

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