has characteristic has characteristic chromosomal disorder ring chromosome disorder MESH:D012303 Chromosomal disorder in which the chromosomal anomaly consists of the presence of a ring chromosome. A ring chromosome is a chromosome whose arms have fused together to form a ring, often with the loss of the ends of the chromosome. supernumerary circular chromosome NCIT:C3360 DOID:0070620 GARD:0026357 MONDO:0700091 ring_chromosome