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tag embryo neuroscience ecology genetics genomics

The Genetics of Society
Claire Asher and Seirian Sumner | Jan 1, 2015 | 10 min read
Researchers aim to unravel the molecular mechanisms by which a single genotype gives rise to diverse castes in eusocial organisms.
Into the Limelight
Kate Yandell | Oct 1, 2015 | 8 min read
Glial cells were once considered neurons’ supporting actors, but new methods and model organisms are revealing their true importance in brain function.
Scientists Strike a Cord
Rabiya Tuma | Feb 9, 2003 | 6 min read
Courtesy of SR Eng  BABY STAINS: The head of a transgenic murine embryo in which a marker enzyme has been specifically expressed in the sensory neurons of the trigeminal and dorsal root ganglia. The marker allows staining of the projections of these neurons into, among other areas, the hindbrain and spinal cord. (S.R. Eng et al., "Defects in sensory axon growth precede neuronal death in Brn3a-deficient mice," J Neurosci, 21:541-9, 2001.) Somewhere in the 200 million bases of the human ge
Brains in Action
The Scientist | Feb 1, 2014 | 10+ min read
Neuroscientists are automating neural imaging and recording, allowing them to monitor increasingly large swaths of the brain in living, behaving animals.
 
Illuminating Behaviors
Douglas Steinberg | Jun 1, 2003 | 6 min read
Courtesy of Genevieve Anderson If not for Nobel laureates Thomas Hunt Morgan, Eric R. Kandel, and Sydney Brenner, the notion of a general behavioral model might seem odd. Behaviors, after all, are determined by an animal's evolutionary history and ecological niche. They are often idiosyncratic, shared in detail only by closely related species. But, thanks to Morgan's research in the early 20th century, and Kandel's and Brenner's work over the past 35 years, the fly Drosophila melanogaster, t
A Paradigm Shift in Stem Cell Research?
Ricki Lewis | Mar 5, 2000 | 9 min read
Photo: E.D. Laywell, UT MemphisMultipotent clones of cells derived from the adult human brain With the promises and challenges of stem cell research in the headlines, visions of artificial livers dance in the public's eye. Bioethicists, politicians, and citizens alike continue to debate whether public funds should be used to obtain cells from human embryos and fetuses. On the scientific front, however, the implications of stem cell research are even more profound than offering replacement parts.
Epigenetic Effects of Mom’s Diet
Emily Willingham | Apr 29, 2014 | 3 min read
Molecular markers of a mother’s nutrition around the time of conception can be found in her child’s DNA.
Surpassing the Law of Averages
Jeffrey M. Perkel | Sep 1, 2009 | 7 min read
By Jeffrey M. Perkel Surpassing the Law of Averages How to expose the behaviors of genes, RNA, proteins, and metabolites in single cells. By necessity or convenience, almost everything we know about biochemistry and molecular biology derives from bulk behavior: From gene regulation to Michaelis-Menten kinetics, we understand biology in terms of what the “average” cell in a population does. But, as Jonathan Weissman of the University of Califo
Porcine Possibilities
Ricki Lewis | Oct 15, 2000 | 8 min read
Courtesy of PPL TherapeuticsA new generation of pigs. Headlines in late summer 2000 introduced long-awaited reports on pig cloning and retroviral transmission to mice, pig cells healing rat spinal cords, and a gaff by Dolly dad Ian Wilmut erroneously heralding halt of xenograft work at the Roslin Institute near Edinburgh, Scotland. So it seemed that the question of whether pigs can pass their retroviruses to humans might finally be on the road to resolution. Not quite. Pigs, as the purveyors o
How Well Do Mice Model Humans?
Ricki Lewis | Oct 25, 1998 | 8 min read
STRIKING RESEMBLANCE: James Croom, who studies Down syndrome mice at North Carolina State University, says the animals are providing valuable information useful to humans. When a page-one article in the May 3, 1998, Sunday New York Times portrayed angiogenesis inhibitors that fight cancer in mice as being possible just around the corner for humans, criticism for raising false hopes erupted. Merely 10 weeks later, however, when researchers from the University of Hawaii reported cloning the fi

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