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oligogene

[ol-i-goh-jeen, uh-lig-uh-]
noun Genetics.
  1. a gene that produces or significantly affects the expression of a qualitative heritable characteristic, acting either alone or with a few other genes.
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Origin of oligogene

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018