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heterozygosis

American  
[het-uh-roh-zahy-goh-sis] / ˌhɛt ə roʊ zaɪˈgoʊ sɪs /

noun

Biology.
  1. the state of being a heterozygote.


Etymology

Origin of heterozygosis

First recorded in 1900–05; hetero- + zygosis