Definitions for "Ring chromosome"
This occurs as a result of the fusion of the two ends of the same chromosome; there is a consequent loss of genetic material.
An abnormal chromosome in which the end of each chromosome arm has been lost, and the broken arms have reunited to form a ring. Functionally ring chromosomes usually act as chromosome deletions.
A chromosome which has broken at each end, lost the terminal segments, curled around and rejoined to form a ring shape. Formation of a ring may result in the loss or deletion of the terminal segments.