The number of copies of a given gene present in the cell of an organism. An increase in gene dosage (by GENE DUPLICATION for example) can result in higher levels of gene product formation. GENE DOSAGE COMPENSATION mechanisms result in adjustments to the level GENE EXPRESSION when there are changes or differences in gene dosage.

Synonyms: Copy Number, Gene, Copy Numbers, Gene, Gene Copy Number, Gene Dosages, Number, Gene Copy, Gene Dosage, Numbers, Gene Copy, Dosage, Gene, Gene Copy Numbers, Dosages, Gene