nullisomyn.
/ˈnʌlᵻˌsəʊmi/, U.S. /ˈnələˌsoʊmi/ Genetics.
The state or condition of being nullisomic.
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the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > types of chromosome > condition
trisomy1930
monosomy1931
polyteny1942
tetrasomy1961
nullisomy1966
1966 Science 23 Dec. 1571/3 Studies on the pairing of homologs at meiosis..should show whether the apparent nullisomy.., monosomy.., and trisomy..are real.
1983 E. C. Minkoff Evolutionary Biol. vii. 128/2 The loss of both chromosomes in a pair results in nullisomy.
2001 Crop Sci. (Nexis) 1 Nov. 1771 In the absence of the Wheat Ph1 pairing gene, either through nullisomy for 5B or the presence of the ph1b gene, increased meiotic associations have been observed between wheat and rye chromosomes.
This is a new entry (OED Third Edition, December 2003; most recently modified version published online March 2022).
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n.1966