XYY syndrome is an aneuploidy (abnormal number) of the sex chromosomes in which a human male receives an extra Y-chromosome, giving a total of 47 chromosomes instead of the more usual 46. This produces a 47,XYY karyotype, which occurs in 1 in 1,000 male births.
Some medical geneticists question whether the term "syndrome" is appropriate for this condition because its clinical phenotype is normal and the vast majority (an estimated 97% in Britain) of 47,XYY males do not know their karyotype.
Read more about XYY Syndrome: Physical Traits, Behavioral Characteristics, Cause, Incidence
Famous quotes containing the word syndrome:
“Women are taught that their main goal in life is to serve othersfirst men, and later, children. This prescription leads to enormous problems, for it is supposed to be carried out as if women did not have needs of their own, as if one could serve others without simultaneously attending to ones own interests and desires. Carried to its perfection, it produces the martyr syndrome or the smothering wife and mother.”
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