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overdominance

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
overdominance [¦ō·vər′däm·ə·nəns]
(genetics)
Monohybrid heterosis, that is, the phenotype is being more pronounced in the heterozygote than in either homozygote with respect to a specified pair of alleles.


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The use of minimal visual cues with the auditory-verbal method is supported by physiological studies that have shown that in deaf animals, an overdominance of visual inputs to the auditory cortex that lead to an incorrect balance between the auditory and visual systems needs to be corrected.
Three hypotheses of nonadditive gene action may explain heterosis: overdominance (Shull 1908, East 1936), dominance (Bruce 1910) and epistasis (Stuber et al.
Overdominance in early life stages of an American oyster strain.
 
 
 
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