Definition of heterozygosis in US English:

heterozygosis

noun

Genetics
  • 1The state of being a heterozygote.

    • ‘It was also at BARC that Wright first proposed the variable he designated as F to express an inbreeding coefficient, the mathematical correlation that measures the decrease in heterozygosis from that in the foundation stock.’
    • ‘The majority of chromosomes carrying these inversions will be found in heterozygosis, and thus we expect a larger reduction of recombination than in inversions with higher frequency.’
    • ‘It was 1913 before convincing cytological evidence for female heterozygosis was produced in moths.’
    • ‘The shortcoming of ISSR markers, as with RAPDs, is that most bands are scored as dominant markers, giving no possibility to distinguish between homozygosis and heterozygosis directly.’
    1. 1.1Biology The formation of a zygote through the fusion of genetically different gametes.

Pronunciation

heterozygosis

/ˌhedərōzīˈɡōsəs/