nullisomen.
/ˈnʌlɪsəʊm/, U.S. /ˈnələˌsoʊm/ Genetics.
= nullisomic n. Also: the missing chromosome of a nullisomic individual or variety.
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the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > chromosomes in respect of meiosis
trivalency1888
zygosome1905
bivalence1909
zygonema1911
trivalent1922
quadrivalent1923
quinquevalent1926
multivalent1929
nullisomic1932
bivalent1937
nullisome1944
1944 Genetics 29 233 Speltoidy..has been shown..frequently to be due to the effects of a particular monosome or its corresponding nullisome.
1944 Genetics 29 234 Seventeen of the possible 21 different nullisomes in Triticum vulgare have now been obtained.
1968 R. Rieger et al. Gloss. Genetics & Cytogenetics 319 Normally, nullisomics (or nullisomes) cannot survive in diploids.
1973 G. S. Khush Cytogenetics Aneuploids ix. 221 In wheat, a successful method was the test of the ability of a particular tetrasome to compensate for a particular nullisome.
1993 Theoret. & Appl. Genetics 86 135 One sequence was localized to the chromosome missing in nullisome I.
This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).
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n.1944