Definition of heterozygosity in US English:

heterozygosity

noun

Genetics
  • The possession of two different alleles of a particular gene or genes by an individual.

    ‘asexual reproduction usually leads to loss of genomic heterozygosity’

Pronunciation

heterozygosity

/ˌhɛdərəˌzaɪˈɡɑsədi//ˌhedərəˌzīˈɡäsədē/