pseudodominancen.
/ˌs(j)uːdəʊˈdɒmᵻnəns/, U.S. /ˌsudoʊˈdɑmən(ə)ns/ Genetics.
Originally: the apparent dominance of a recessive allele in a heterozygote resulting from the deletion (or inactivation) of all or part of the chromosome bearing the dominant allele. Later (now usually): the appearance of a recessive trait in successive generations of a family, resulting from matings between homozygotes and heterozygotes.
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the world > life > biology > biological processes > genetic activity > genetic components > [noun] > allele > dominant or recessive
recessiveness1896
recessive1900
dominance1902
coupling1906
pseudodominance1921
pseudodominant1948
1921 Proc. National Acad. Sci. U.S.A. 7 190 Haploidy for the first [chromosome] gives the male type and pseudo-dominance of sex-linked recessives.
1938 Yearbk. Carnegie Inst. 37 306 The ‘Minute’ effect is lethal when homozygous..and gives pseudo-dominance to straw in hybrids.
1991 J. L. Karlsson Genetics Human Mentality 41 This actually illustrates the phenomenon of pseudodominance, a homozygous recessive parent by chance having a carrier spouse, resulting in a 50 percent risk in the offspring.
2004 Jrnl. Amer. Soc. Dermatol. 51 (Suppl.) 13/2 Most instances of apparent multigenerational involvement have ultimately shown pseudodominance, the result of affected homozygotes..mating with unaffected heterozygote carriers.
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).
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n.1921