• WordNet 3.6
    • n heterozygote (genetics) an organism having two different alleles of a particular gene and so giving rise to varying offspring
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Century Dictionary and Cyclopedia
    • n heterozygote A zygote formed by the union of two unlike gametes.
    • n heterozygote In Mendelian phraseology, a hybrid animal or plant which combines the characters of two dissimilar parents; a mule-form.
    • heterozygote Of or pertaining to a fertilized egg, or to origin from a fertilized egg, which is formed by the union of two opposite allelomorphic germ-cells: as, heterozygote characters.
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In literature:

If the individual was really a heterozygote, approximately fifty per cent.
"Being Well-Born" by Michael F. Guyer

In science:

In the above equations, s is a selection coefficient and h is a dominance parameter which controls the contribution of the master sequence to the fitness of the heterozygote.
Nonlinear deterministic equations in biological evolution
The dominance is absent when h = 1/2 as the heterozygote fitness W (0, σ) = 1 + s is the average of the master fitness and the mutant fitness.
Nonlinear deterministic equations in biological evolution
He or she can choose the same allele twice (homozygote) or different alleles (heterozygote).
Markov basis and Groebner basis of Segre-Veronese configuration for testing independence in group-wise selections
A is the heterozygote, AA is the risk homozygote) is known.
Fractal Characterizations of MAX Statistical Distribution in Genetic Association Studies
Thus, the imperfect LD will change certain models, such as the dominant or the recessive models, so that the heterozygote penetrance will have an intermediate value between those for the homozygotes.
Robust Tests in Genome-Wide Scans under Incomplete Linkage Disequilibrium