heterotropicadj.
/ˌhɛt(ə)rə(ʊ)ˈtrɒpɪk/ 1. Physics. = anisotropic adj., aeolotropic adj.
ΚΠ
1885 H. W. Watson & S. H. Burbury Math. Theory Electr. & Magn. I. 203 These ratios..have a determinate value at every point in a heterotropic medium, but may vary from point to point.
2. Genetics. Applied to chromosomes that are not paired at meiosis.
ΘΚΠ
the world > life > biology > biological processes > genetic activity > genetic components > [adjective] > chromosome > chromosomes in respect of meiosis
non-homologous1883
quadrivalent1898
univalent1898
bivalent1899
plurivalent1901
homologous1903
heterotropic1905
monovalent1906
heteromorphic1917
homomorphic1917
trivalent1921
multivalent1929
sexivalent1931
nullisomic1932
quinquevalent1935
1905 E. B. Wilson in Jrnl. Exper. Zool. 2 508 Since there is no reason for considering the ‘accessory chromosome’ as in any sense accessory to the others,..I suggest that..chromosomes of this type may provisionally be called heterotropic chromosomes (in allusion to the fact that they pass to one pole only of the spindle in one of the maturation-divisions).
1920 L. Doncaster Introd. Study Cytol. xi. 155 When..the heterotropic or X-chromosome passes undivided to one pole of the first spermatocyte division-figure, it divides equationally in the division of those secondary spermatocytes which contain it.
This entry has not yet been fully updated (first published 1898; most recently modified version published online June 2019).
<
adj.1885