Nucleolar organizer

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Nucleolus organizer region
Nucleolus organizer region (NOR) is a chromosomal region around which the nucleolus forms. It is also called the "nucleolar organizer". The region contains several tandem copies of ribosomal RNA genes.
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WordNet 2.0 DictionaryDownload this dictionary
nucleolar organizer
Noun
1. the particular part of a chromosome that is associated with a nucleolus after nuclear division
(synonym) nucleolus organizer, nucleolus organiser, nucleolar organiser
(hypernym) structure, anatomical structure, complex body part, bodily structure, body structure
(part-holonym) chromosome



Common Terms in Evolutionary Biology and Genetics DictionaryDownload this dictionary
Nucleolar organizer
A region on a chromosome that is associated with formation of a new nucleolus following cell division. It contains the genes for several species of ribosomal RNA (rRNA), i.e., 18S, 5.8S, 5S and 28S in eukaryotes.

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