Nucleolus Organizer (Noun)
Meaning
The particular part of a chromosome that is associated with a nucleolus after nuclear division.
Classification
Nouns denoting body parts.
Examples
- The nucleolus organizer region is found in the secondary constriction near the centromere of a chromosome.
- Nucleolus organizer regions are specific chromosomal locations that provide binding sites for ribosomal RNA synthesis.
- During cell division the nucleolus disappears and its material is distributed to the nucleolus organizer regions on the sister chromatids.
- The nucleolus organizer regions are often found at the secondary constrictions of metaphase chromosomes.
- In the interphase nucleus the nucleolus organizer regions can form distinct condensates that segregate from the bulk chromatin.