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The Southern Gastric-Brooding Frog
By: Christopher Rojas
| Published: Jan 26, 2015
The Southern Gastric-Brooding Frog (Rheobatrachus silus) was an aquatic frog that lived in south-east Australia. In 2002, the International Union…
Sexual behavior in animalsReproductive BehaviorExtinction (Biology)Extinct animalsCloning
Eduard Friedrich Wilhelm Pflüger (1829-1910)
By: Megan Kearl
| Published: Jun 22, 2012
Eduard Friedrich Wilhelm Pflüger was a physiologist known for his research on respiration, the respiratory quotient, experimenting on the effects of…
PeopleRespiratory quotientRespirationEmbryologyEmbryos
"Developmental Capacity of Nuclei Transplanted from Keratinized Skin Cells of Adult Frogs" (1975), by John Gurdon, Ronald Laskey, and O. Raymond Reeves
By: Sean Cohmer
| Published: Jun 14, 2011
In 1975 John Gurdon, Ronald Laskey, and O. Raymond Reeves published "Developmental Capacity of Nuclei Transplanted from Keratinized Skin Cells of…
Nuclear Transfer TechniquesExperimentsPublicationsFrogsNuclear Transplantation
Gastrulation in Xenopus
By: Inbar Maayan
| Published: Mar 10, 2011
The process of gastrulation allows for the formation of the germ layers in metazoan embryos, and is generally achieved through a series of complex…
Haeckel, Ernst, 1834-1919GastrulationAmphibiansFrogs
"Contributions to the Development of the Embryo. On the Artificial Production of One of the First Two Blastomeres, and the Later Development (Postgeneration) of the Missing Half of the Body" (1888), by Wilhelm Roux
By: Megan Kearl
| Published: Jul 20, 2009
Wilhelm Roux was an influential figure in the early history of experimental embryology. Although he originally studied medicine, he was invited to be…
LiteratureRoux, Wilhelm, 1850-1924ExperimentsFrogsOva
Johannes Holtfreter (1901-1992)
By: Adam R. Navis
| Published: Feb 29, 2008
Johannes Holtfreter made important discoveries about the properties of the organizer discovered by Hans Spemann. Although he spent much time away…
Organizers, EmbryonicBiographyFrogs
"Experiments in Transplanting Limbs and Their Bearing Upon the Problems of the Development of Nerves" (1907), by Ross Granville Harrison
By: Adam R. Navis
| Published: Nov 08, 2007
In his 1907 paper, "Experiments in Transplanting Limbs and Their Bearing Upon the Problems of the Development of Nerves," in the Journal of…
TransplantationExperimentsFrogsAmphibians