Latest Adaptive mutation Stories

2011-08-02 19:52:16

For more than a decade, Dr. Susan Rosenberg, professor of molecular and human genetics at Baylor College of Medicine, has solidified her premise that when cells are under stress, the rate of gene changes called mutations goes up, a finding that has implications for a wide variety of biological phenomena "“ from evolution to antibiotic resistance and cancer. In a report that appears online today in the Proceedings of the National Academy of Sciences, she and her colleagues not only show...

2010-01-20 15:05:07

Biologists at the University of Pennsylvania studying the processes of evolution appear to have resolved a longstanding conundrum: How can organisms be robust against the effects of mutations yet simultaneously adaptable when the environment changes? The short answer, according to University of Pennsylvania biologist Joshua B. Plotkin, is that these two requirements are often not contradictory and that an optimal level of robustness maintains the phenotype in one environment but also allows...

2009-01-16 13:11:54

New evidence from a study of yeast cells has resulted in the most detailed picture of an organism's evolutionary process to date, says a Texas A&M University chemical engineering professor whose findings provide the first direct evidence of aspects, which up until now have remained mostly theory.Working with populations of yeast cells, which were color-coded by fluorescent markers, Katy Kao, assistant professor in the Artie McFerrin Department of Chemical Engineering, and Stanford...

2005-09-16 13:50:00

HOUSTON --  When Dr. Susan Rosenberg, professor of molecular and human genetics at Baylor College of Medicine, first published her finding that the mutation rate increased in bacteria stressed by starvation, sometimes resulting in a rare change that benefited the bacteria, it was controversial. In a report in the current issue of the journal Molecular Cell, she and her colleagues describe not only how it happens but also show that this only occurs at a special time and place in the...

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  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.