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Definition of Marker chromosome

Marker chromosome: An abnormal chromosome that is distinctive in appearance but not fully identified. A marker chromosome is not necessarily a marker for a specific disease or abnormality, but it can be distinguished under the microscope from all the normal human chromosomes. For example, the fragile X (FRAXA) chromosome was once called the marker X.

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Heart Disease: Causes of a Heart Attack See Slideshow
Reviewed on 12/12/2018
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