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Davis v. Davis (1992)
By: Mark Zhang, Jennifer E. Chapman
| Published: Oct 17, 2013
In Davis v. Davis (1992), the Supreme Court of Tennessee decided a dispute over cryopreserved preembryos in favor of Junior Lewis Davis, who sought…
LawFrozen human embryosFertilization in VitroAmerican Fertility SocietyConception
Hedgehog Signaling Pathway
By: Dorothy R. Haskett
| Published: Jul 30, 2015
The hedgehog signaling pathway is a mechanism that directs the development of embryonic cells in animals, from invertebrates to vertebrates. The…
EmbryologyEmbryosWieschaus, Eric F.Cellular signal transductionDrosophila melanogaster
Somatic Cell Nuclear Transfer in Mammals (1938-2013)
By: Zane Bartlett
| Published: Nov 04, 2014
In the second half of the twentieth century, scientists learned how to clone organisms in some species of mammals. Scientists have applied somatic…
CloningCell nuclei--TransplantationSpemann, Hans, 1869-1941Genetic Engineering
"A molecular wound response program associated with regeneration initiation in planarians" (2012), by Danielle Wenemoser et al.
By: Joe Brinkman
| Published: May 09, 2017
In 2012, a team of scientists across the US conducted an experiment to find the mechanism that allowed a group of flatworms, planarians, to…
Regeneration (Biology)GeneticsPlanariansGenesWound Healing
"β-Catenin Defines Head Versus Tail Identity During Planarian Regeneration and Homeostasis" (2007), by Kyle A. Gurley, Jochen C. Rink, and Alejandro Sánchez Alvarado
By: Mary E. Sunderland
| Published: Mar 15, 2010
Alejandro Sánchez Alvarado's laboratory group has employed molecular tools to investigate old questions about regeneration and as a result have…
RegenerationExperiments
The Y-Chromosome in Animals
By: Dorothy R. Haskett
| Published: May 28, 2015
The Y-chromosome is one of a pair of chromosomes that determine the genetic sex of individuals in mammals, some insects, and some plants. In the…
Y ChromosomeSex ChromosomesEmbryosDNAChromosomes
"Experiments in Plant Hybridization" (1866), by Johann Gregor Mendel
By: Amanda Andrei
| Published: Sep 04, 2013
During the mid-nineteenth century, Johann Gregor Mendel experimented with pea plants to develop a theory of inheritance. In 1843, while a monk in the…
GeneticsPeasLegumesPhenotypePlant breeding
The Notch Signaling Pathway in Embryogenesis
By: Justin Wolter
| Published: Mar 06, 2013
The Notch signaling pathway is a mechanism in animals by which adjacent cells communicate with each other, conveying spatial information and genetic…
EmbryologyDevelopmental BiologyEmbryosCell differentiationNotch genes
Edwin Stephen Goodrich (1868-1946)
By: Joe Brinkman
| Published: Dec 30, 2014
Edwin Stephen Goodrich studied the structures of animals in England during the nineteenth and twentieth centuries. Goodrich studied how animals…
ZoologyHomology (Biology)InvertebratesEvolution
Induced Pluripotent Stem Cells
By: Katherine Brind'Amour
| Published: May 06, 2010
Induced Pluripotent Stem Cells (iPSCs) are cells derived from non-pluripotent cells, such as adult somatic cells, that are genetically manipulated so…
LiteratureStem CellsRegeneration