nullisome Cytology.
(ˈnʌlɪsəʊm)
[f. L. nulli-, nullus no + -some4.]
A pair of homologous chromosomes lacking from a diploid chromosome complement; also, a nullisomic individual.
| 1944 Genetics XXIX. 233 Speltoidy..has been shown..frequently to be due to the effects of a particular monosome or its corresponding nullisome. Ibid. 234 Seventeen of the possible 21 different nullisomes in Triticum vulgare have now been obtained. 1968 [see next]. 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. |