| 释义 |
gynogenesis Zool.|gaɪnəʊˈdʒɛnɪsɪs|
[f. gyno- + -genesis.]
Reproduction in which the development of the embryo occurs as a result of the penetration of an ovum by a sperm but does not involve the nuclear material of the latter.
1925E. B. Wilson Cell (ed. 3) v. 460 In a nearly related phenomenon, which may be called gynogenesis, the sperm penetrates (and in some cases activates) the egg but otherwise takes no part in the processes of development. 1952Boyd & Hamilton in A. S. Parkes Marshall's Physiol. Reprod. (ed. 3) II. xiv. 42 Gynogenesis may occur to a limited degree in mammals as the result of irradiation of the semen. 1969R. F. Chapman Insects xix. 380 An unusual type of thelytoky, known as gynogenesis, occurs in the form mobilis of Ptinus clavipes (Coleoptera). The form mobilis exists only as triploid females which reproduce parthenogenetically, but the development of eggs is triggered by healthy sperm of P. clavipes or, less successfully, of P. pusillus.
Hence gynogeˈnetic a.
1925E. B. Wilson Cell (ed. 3) v. 463 The conclusion seems probable..that even in such (presumably) diploid larvæ development is gynogenetic, the diploid number having been restored by a doubling of the maternal haploid group. 1964L. B. Russell in C. Pavan et al. Mammalian Cytogenetics 64 Ultraviolet irradiation of spermatozoa can destroy the paternally contributed chromatin without affecting the activating function of the sperm and thus lead to gynogenetic haploids. |