Definition of ring chromosome in English:

ring chromosome

noun

Genetics Medicine
  • 1A circular chromosome or pair (or larger group) of chromosomes found as part of the normal karyotype of an organism or developing gamete.

  • 2An abnormal circular chromosome, typically formed by the loss of the ends of both arms of a normal linear chromosome with fusion of the remaining ends (frequently with postmodifying number or letter denoting the chromosome of origin); (also) a congenital syndrome resulting from the possession of a such a chromosome.

Origin

Late 19th century; earliest use found in Quarterly Journal of Microscopical Science.