Satellite (chromosome)
The term should not be confused with satellite DNA .
In genetics and cytology , the term satellite describes the end section on the short leg of a chromosome , which is separated from the rest of the chromosome by a secondary constriction point. They are also known as SAT chromosomes. In the case of a condensed chromosome, in addition to the primary constriction on the centromere, there is another constriction behind which visible DNA is attached like a satellite.
The constrictions that make up the satellite may contain ribosomal DNA and are known as the nucleolus organizer region (NOR).
Individual evidence
- ↑ T. Schmidt, T. Schwarzacher & JS Heslop-Harrison: "Physical mapping of rRNA genes by fluorescent in-situ hybridization and structural analysis of 5S rRNA genes and intergenic spacer sequences in sugar beet (Beta vulgaris)" in: Theoretical and Applied Genetics Issue 88, pp. 629-636 (1994)