overdominance

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noun

The case in which a heterozygote has a higher fitness or more extreme phenotype than either homozygote.

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Meanings

nounoverdominance (usually uncountable, plural overdominances)

plural overdominances

  1. uncountableusuallybiologyThe case in which a heterozygote has a higher fitness or more extreme phenotype than either homozygote.
  2. uncountableusuallyExcessive dominance.

Origin

From over- + dominance.

Full word history & related roots →
Cite this entry
APA

overdominance. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/overdominance

MLA

“overdominance.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/overdominance. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “overdominance,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/overdominance.

Source: overdominance on Wiktionary, CC BY-SA 4.0.