| 释义 |
heterotropic, a.|-ˈtrɒpɪk|
[f. as heterotropal a. + -ic: cf. Gr. τροπικός of or pertaining to turning.]
1. Physics. = anisotropic, æolotropic.
1885Watson & Burbury Math. Th. 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.
1905E. B. Wilson in Jrnl. Exper. Zool. II. 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). 1920L. 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. |