Abnormal chromosome in which both ends have been lost and the two broken ends have reunited to form a ring-shaped structure.
See also: chromosome deletion
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 736 (https://doi.org/10.1515/pac-2015-1202)