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Nucleus

Synonym(s)

The cellular organelle in eukaryotes that contains most of the genetic material.: Definition from: Human Genome Project Information at the U.S. Department of Energy
The cell structure that houses the chromosomes.: Definition from: Office of Rare Diseases at the National Institutes of Health
A nucleus is a membrane-bound organelle that contains the cell's chromosomes. Pores in the nuclear membrane allow for the passage of molecules in and out of the nucleus.: Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute