nonmosaic trisomy

Can You Have An Extra Chromosome And Be Normal?

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Can You Have An Extra Chromosome And Be Normal? Can you have an extra chromosome and be normal? A common form of aneuploidy is trisomy, or the presence of an extra chromosome in cells. “Tri-” is Greek for “three”; people with trisomy have three copies of a particular chromosome in cells instead of the normal

Did John Langdon Down Have Down Syndrome?

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Did John Langdon Down Have Down Syndrome? Did John Langdon Down have Down syndrome? John Langdon Down Portrait of Down Born John Langdon Haydon Down18 November 1828 Torpoint, Cornwall, England Why is Down syndrome named after John Langdon Down? He asked Norman (!) Langdon Down if his family name could be used to indicate the