Definition of heterosis in English:


Line breaks: het¦er|osis
Pronunciation: /ˌhɛtəˈrəʊsɪs


  • technical term for hybrid vigour.
    More example sentences
    • With overdominance, unlike alleles are postulated to result in a stimulating effect, so that genetic heterozygosity per se produces heterosis.
    • Genetic background, heterosis, and sex differences can all have profound effects on chiasma and recombination frequencies.
    • The fundamental genetic and physiological causes of heterosis remain poorly understood in plants after nearly a century of exploitation in crop improvement.


early 20th century: from Greek heterōsis 'alteration', from heteros 'other'.

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