| 单词 | ring chromosome |
| 释义 | > as lemmasring chromosome ring chromosome n. [compare sense 13f] Genetics and Medicine (a) a circular chromosome or pair (or larger group) of chromosomes found as part of the normal karyotype of an organism or developing gamete; (b) an 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. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > group of chromosomes tetrad1876 ring chromosome1895 genome1926 ring1949 1895 Q. Jrnl. Microsc. Sci. 38 287 The double ropes thus formed, dividing into equal segments, eventually give rise to twelve thick loops which..form the twelve ring chromosomes. 1967 Jrnl. Pediatrics 70 172/1 A ring chromosome may result when breaks occur simultaneously in each of the two arms of a single chromosome. 1996 Star-Ledger (Newark, New Jersey) (Nexis) 26 Apr. Doctors had warned her of other problems symptomatic of Ring Chromosome 20, including a ‘bad’ heart murmur. 2004 A. A. Killeen Princ. Molecular Pathol. iii. 84 Ring chromosomes are seen as a frequent abnormality in some types of cancer. < as lemmas |
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