polysomyn.
/ˈpɒlɪˌsəʊmi/, U.S. /ˈpɑliˌsoʊmi/ Genetics.
The state or condition of being polysomic.
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the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > ploidy
triploidy1916
tetraploidy1918
haploidy1921
hexaploidy1922
polyploidy1922
octoploidy1924
aneuploidy1925
heteroploidy1926
allopolyploidy1927
autopolyploidy1928
hyperdiploidy1929
polysomy1929
hyperploidy1930
hypoploidy1930
mixoploidy1931
syndiploidy1932
allotetraploidy1933
autotetraploidy1935
monoploidy1937
polysomaty1937
ploidy1940
pseudodiploidy1965
polysomatism1967
1929 Proc. National Acad. Sci. U.S.A. 15 883 All four genera possess 7n chromosomes, more or less, the variations being due to fragmentation, fusion and polysomy.
1946 Nature 17 Aug. 239/2 It is not impossible that polysomy and failure of pairing may be jointly responsible for the abnormal numbers [of chromosomes] observed.
1973 Cytogenetics & Cell Genetics 12 87 The first recorded observation of XYY polysomy in man was made by Sandberg et al. in 1961.
2000 Proc. National Acad. Sci. U.S.A. 97 6609/1 Polysomy has been considered a powerful mechanism for protection against inbreeding.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1929