منابع مشابه
Evolution of castes in Polistes
A novel hypothesis for the origin of castes in Polistes has recently been proposed: the worker and gyne castes among offspring of a Polistes colony are based on the underlying ground plan of reproductive physiology that would have characterized the non-diapause and diapause generations of a bivoltine solitary vespid wasp. Here the hypothesis is reviewed in light of the dynamic nature of diapaus...
متن کاملautopolyploidy and parthenogenesis in animals
6 1 Division of Epigenetics, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), 7 Im Neuenheimer Feld 580, 69120 Heidelberg, Germany 8 2 Institute for Environmental Sciences, University of Koblenz-Landau, Forststrasse 7, 76829 9 Landau, Germany 10 3 Institute of Pharmacy and Biochemistry, Johannes Gutenberg-University Mainz, 11 Staudingerweg 5, 55128 Mainz, Germany 12 * present address: ...
متن کاملThe effect of osmolarity on mouse parthenogenesis.
Eggs from (C57B1 x A a G ^ mice were activated by treatment with hyaluronidase, which removed the follicle cells, and cultured in vitro. Observations were made 6-8 h after hyaluronidase treatment to determine the frequency of activation and the types of parthenogenones induced. Cumulus-free eggs resulting from hyaluronidase treatment were incubated for 2\ h in culture media of various osmolarit...
متن کاملPhenotypic evolution and parthenogenesis
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متن کاملThelytokous parthenogenesis in eusocial Hymenoptera.
Female parthenogenesis, or thelytoky, is particularly common in solitary Hymenoptera. Only more recently has it become clear that many eusocial species also regularly reproduce thelytokously, and here we provide a comprehensive overview. Especially in ants, thelytoky underlies a variety of idiosyncratic life histories with unique evolutionary and ecological consequences. In all eusocial species...
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ژورنال
عنوان ژورنال: Annals and Magazine of Natural History
سال: 1870
ISSN: 0374-5481
DOI: 10.1080/00222937008696159