Johns Hopkins scientists report what is believed to be the first evidence that complex, reversible behavioral patterns in bees – and presumably other animals – are linked to reversible chemical tags on genes.
Plants & Animals
Sep 16, 2012
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(Phys.org)—The sorcerer's apprentice started a water-carrying system, but couldn't stop it, and soon he was up to his neck in water, and trouble. Living cells have a better design: When they activate a gene, they have a ...
Cell & Microbiology
Sep 6, 2012
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Some RNA molecules spend time in a restful state akin to hibernation rather than automatically carrying out their established job of delivering protein-building instructions in cells, new research suggests.
Cell & Microbiology
Aug 27, 2012
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(Phys.org) -- The propagation of every animal on the planet is the result of sexual activity between males and females of a given species. But how did things get this way? Why two sexes instead of one? Why are sperm necessary ...
Biotechnology
Aug 9, 2012
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Mammalian cells pack their genome into a highly organized three-dimensional structure, in which the thread-like DNA is wrapped tightly around spool-like proteins. This structure, known as chromatin, plays an important role ...
Cell & Microbiology
Jul 18, 2012
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Popularly dubbed "the book of life," the human genome is extraordinarily difficult to read. But without full knowledge of its grammar and syntax, the genome's 2.9 billion base-pairs of adenine and thymine, cytosine and guanine ...
Biotechnology
Jul 1, 2012
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In exploring how proteins interact with crucial DNA sequences to regulate gene activity, researchers have shed light on key biological events that may eventually be manipulated to provide new disease treatments.
Cell & Microbiology
Jun 7, 2012
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Humans, fish and frogs share neural circuits responsible for a diversity of social behavior, from flashy mating displays to aggression and monogamy, that have existed for more than 450 million years, biologists at The University ...
Other
May 31, 2012
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A little more than a decade ago, researchers discovered an ancient mechanism that cells use to silence genes. Like a dimmer switch turning down a light, RNA interference (RNAi) dials down gene activity in simple organisms ...
Cell & Microbiology
May 17, 2012
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The lengthening of days in late winter is an important signal that stimulates the reproductive activity of many animals. Animals living in the milder climatic conditions of southern Europe usually begin breeding earlier in ...
Plants & Animals
Apr 24, 2012
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