Wiktionary
heterozygosity
n. the condition of being heterozygous
WordNet
heterozygosity
n. the state of being heterozygous; having two different alleles of the same gene [ant: homozygosity]
Usage examples of "heterozygosity".
Back in the lab, the freshened Stephie tries to engage Gus in a deep conversation about the loss of heterozygosity or some other such nonsense.
Heterozygosity and genetic diversity seems to breed better resistance.