Nucleolar Organiser (Noun)
Meaning
The particular part of a chromosome that is associated with a nucleolus after nuclear division.
Classification
Nouns denoting body parts.
Examples
- The nucleolar organiser region in a chromosome is usually the site where ribosomal RNA genes are located and the nucleolus is formed.
- Nucleolar organisers are genetic elements in chromosomes that play a crucial role in the formation of nucleoli during cell division.
- Eukaryotic chromosomes contain one or many nucleolar organisers where nucleolus formation occurs after each cell division cycle.
- Nucleolar organisers consist of large repetitive DNA sequences and are the specific sites where the nucleolus will eventually be assembled during the cell cycle.
- In humans, the nucleolar organisers are found on the short arm of the five acrocentric chromosomes which are responsible for the nucleoli in resting cells.