haplodiploid, a. Biol.
Brit. /ˌhapləʊˈdɪplɔɪd/, U.S. /ˌhæploʊˈdɪˌplɔɪd/
[‹ haplo- comb. form + diploid adj. Compare earlier haploid adj.]
Having both haploid and diploid aspects; esp. designating, relating to, or possessing a system of reproduction (as in hymenopteran insects) in which females develop from fertilized diploid eggs and males from unfertilized haploid ones.
| 1932 Biol. Bull. 63 306 It is highly probable that the haplo-diploid male mosaics have been missed on account of failure of obvious mosaicism, being classified either as normal haplonts or as biparental males. 1964 Hereditas 52 121 Among 25 plants growing in the greenhouse, we found two to be haplo-diploid chimaeras. 1989 Jrnl. Heredity 80 39/2 As a consequence of the haplodiploid genetic system (equivalent to X-linked inheritance) of the Hymenoptera, the expected mean within-family genotypic variance of (haploid) males is four times greater than that of their (diploid) sisters. 2001 G. C. McGavin Essent. Entomol. 170 Like the Hymenoptera, thrips are haplodiploid. |
Derivatives. haplodiploidy n.
| 1944 Biol. Bull. 87 174 Its loss, and the substitution of alternative mechanisms—(*haplo-diploidy in the Iceryini and the as yet unsolved sex determining mechanisms of Pseudococcus..and Lecanium)..have occurred in all other forms thus far investigated. 2002 Nature 25 Apr. 782/3 Haplodiploidy creates some bizarre family dynamics... A mother's relatedness to her son is 0.5, but consider the same relationship from his perspective and r rises to 1.0. |