nulliplex, a. Genetics.
(ˈnʌlɪplɛks)
[f. L. nulli-, nullus no + -plex as in simplex, duplex adjs. etc.]
Of a polyploid individual: having the dominant allele of any particular gene not represented.
| 1921 A. F. Blakeslee in Amer. Naturalist LV. 257 A Poinsettia plant may, to speak in terms of the dominant factor, be considered nulliplex with no dominant genes, or simplex, duplex or triplex with, respectively, 1, 2, or 3 dominant factors. 1929 Jrnl. Genetics XXI. 141 From previous results it has been assumed that 14/26 is triplex for Y and heterozygous for I, and that ‘White Star’ is nulliplex for Y and heterozygous for I. 1963 Lewis & John Chromosome Marker iv. iii. 327 On selfing, a tetraploid of this kind [sc. AAaa] will give not three types of offspring but five, namely AAAA (quadruplex), AAAa (triplex), AAaa (duplex), Aaaa (simplex) and aaaa (nulliplex). Ibid. 328 Thus, with chromatid segregation a triplex can produce nulliplex offspring. |