gynogenesis

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Related to gynogenetic: automixis, Hybridogenesis

gynogenesis

 [gi″no-] , [jin″o-jen´ĕ-sis]
development of an egg that is stimulated by a sperm in the absence of any participation of the sperm nucleus.

gy·no·gen·e·sis

(gī'nō-jen'ĕ-sis, jin-ō-),
Oocyte development activated by a sperm, but to which the male gamete contributes no genetic material.
[gyno- + G. genesis, production]

gynogenesis

(gī′nə-jĕn′ĭ-sĭs, jĭn′ə-)
n.
Parthenogenesis in which the egg is activated by sperm, but without fusion of the egg and sperm nuclei.

gy′no·ge·net′ic (-jə-nĕt′ĭk) adj.

gy·no·gen·e·sis

(gī'nō-jen'ĕ-sis)
Oocyte development activated by a sperm, but to which the male gamete contributes no genetic material.
[gyno- + G. genesis, production]

gynogenesis

the parthenogenetic development of an egg after the egg membranes have been penetrated by a male gamete. There is no nuclear fusion and stimulation of development might be purely mechanical.
References in periodicals archive ?
Poecilia formosa and other gynogenetic animals are dependent for reproduction on related free-living sperm-donor species and are thus unable to extend their geographical ranges or potential evolutionary survival beyond those of their sympatric hosts [19].
In this study, ruptured chromosome fragments were identified as a result of the karyotype analysis in haploid gynogenetic embryos.
Growth and feed utilization in two strains of gibel carp, Carassius auratus gibelio: paternal effects in a gynogenetic fish.
1976.--Morphology of androgenetic and gynogenetic grass carp, Ctenopharyngodon idella (Valenciennes).
For example, because gynogenetic fish inherit genes only from their mothers, they normally are all females.
As previously reported (Elder and Schlosser 1995), all 464 individual gynogens fingerprinted from the Lost Ponds drainage were genetically identical, indicating that a single gynogenetic clone occupied the entire drainage.
In gynogenetic development, spermatozoa stimulate the development of eggs but do not contribute paternal genome to the offspring.
But the gynogenetic fertilization process also decreases genetic variability within those offspring that do survive, enabling us to more easily select and enhance a particular trait.
(2000) compared nuclear behavior between normal and gynogenetic eggs of Crassostrea gigas using DAPI staining and epifluorescence microscopy.
In this study, black spot parasites of the Phoxinus eos-neogaeus gynogenetic cyprinid complex, in Voyageurs National Park, were used to re-test the Red Queen Hypothesis, which suggest that sexual fish have an advantage over clonal fish regarding parasite loads.