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Down Syndrome (Trisomy 21; Trisomy G)

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Down Syndrome: Trisomy 21

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Down Syndrome: Trisomy 21

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  • Down Syndrome (Trisomy 21; Trisomy G)
  • A set of chromosomes from a patient with Down syndrome. Chromosomes 21, which should be a pair, have an extra chromosome, making three of a kind.

    Photograph © 1990 SPL/Custom Medical Stock Photo.

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