Skip to main content
Select Source:

overdominance

overdominance (superdominance) In genetics, the phenomenon in which the character of the heterozygotes is expressed more markedly in the phenotype than in that of either homozygote. Usually the heterozygote is fitter than the two homozygotes: this can give rise to monohybrid heterosis, the hybrid vigour obtained by crossing parents differing in a single specified pair of allelic genes. See also BALANCED POLYMORPHISM.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"overdominance." A Dictionary of Plant Sciences. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"overdominance." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/overdominance

"overdominance." A Dictionary of Plant Sciences. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/overdominance

overdominance

overdominance (superdominance) In genetics, the phenomenon in which the character of the heterozygotes is expressed more markedly in the phenotype than in that of either homozygote. Usually the heterozygote is fitter than the two homozygotes: this can give rise to monohybrid heterosis, the hybrid vigour obtained by crossing parents differing in a single specified pair of allelic genes. See also BALANCED POLYMORPHISM.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"overdominance." A Dictionary of Zoology. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"overdominance." A Dictionary of Zoology. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/overdominance-0

"overdominance." A Dictionary of Zoology. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/overdominance-0