Examples from the Web for heterozygote
If the individual was really a heterozygote, approximately fifty per cent.Being Well-Born|Michael F. Guyer
In this character, then, dominance almost always fails to show itself in the heterozygote and often fails in pure dominants.
The heterozygote produced by crossing these forms is intermediate in size and appearance.Mendelism|Reginald Crundall Punnett
But in a heterozygote potency is usually more or less reduced.
Some are probably matings of two heterozygotes, others of two recessives, and others still of a recessive with a heterozygote.