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Numerical disorders

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A chromosomal number that is an exact multiple of the haploid number of 23 chromosomes in humans, and exceeds the diploid number of 46 chromosomes is called polyploidy. A state with a chromosomal number not an exact multiple of haploid's is called aneuploidy.

Examples of numerical disorders are:

  • 92, XXYY tetraploidy
  • 69, XXY triploidy
  • 47, XX, (21) trisomy 21
  • 47, XY, (18) trisomy 18
  • 47, XX, (16) trisomy 16
  • 47, XX, (13) trisomy 13
  • 47, XXY Klinefelter's syndrome
  • 47, XXX Trisomy X
  • 45, X Turner's Syndrome
  • 49, XXXXY Klinefelter's variant

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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