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[het-er-uh-zahy-goht, -zig-oht] /ˌhɛt ər əˈzaɪ goʊt, -ˈzɪg oʊt/
noun, Genetics.
a hybrid containing genes for two unlike forms of a characteristic, and therefore not breeding true to type.
Origin of heterozygote
First recorded in 1900-05; hetero- + zygote Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for heterozygote
Historical Examples
  • If the individual was really a heterozygote, approximately fifty per cent.

    Being Well-Born Michael F. Guyer
  • Eosin is allelomorphic to white and the white-eosin compound or heterozygote has the color of the eosin male.

  • In this character, then, dominance almost always fails to show itself in the heterozygote and often fails in pure dominants.

  • Some are probably matings of two heterozygotes, others of two recessives, and others still of a recessive with a heterozygote.

  • But in a heterozygote potency is usually more or less reduced.

  • The heterozygote produced by crossing these forms is intermediate in size and appearance.


    Reginald Crundall Punnett
  • heterozygote (different yolk), a zygotic individual which contains both members of an allelomorphic pair.

    Applied Eugenics Paul Popenoe and Roswell Hill Johnson
British Dictionary definitions for heterozygote


/ˌhɛtərəʊˈzaɪɡəʊt; -ˈzɪɡəʊt/
an animal or plant that is heterozygous; a hybrid Compare homozygote
Derived Forms
heterozygosis, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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heterozygote in Medicine

heterozygote het·er·o·zy·gote (hět'ə-rō-zī'gōt')
An organism that has different alleles at a particular gene locus on homologous chromosomes.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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