Karyotype Test: Results


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Results


Karyotype is a test to identify and evaluate the size, shape, and number of chromosomes in a sample of body cells.

Results of a karyotype test are usually available within 1 to 2 weeks.

Karyotype
Normal:
  • There are 46 chromosomes that can be grouped as 22 matching pairs and 1 pair of sex chromosomes (XX for a female and XY for a male).
  • The size, shape, and structure are normal for each chromosome.
Abnormal:
  • There are more than or less than 46 chromosomes.
  • The shape or size of one or more chromosomes is abnormal.
  • A chromosome pair may be broken or incorrectly separated.


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Last updated: April 26, 2007
Author: Maria G. Essig, MS, ELS
Reviewed By: Joy Melnikow, MD, MPH - Family Medicine, Renee H. Martin, PhD - Medical Genetics
Editors: Susan Van Houten, RN, BSN, MBA, Tracy Landauer

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