Alternative Evolution: Why Change Your Own Genes When You Can Borrow Someone Else's?
By SCIENCEDAILY - SCIENCEDAILY
Updated: Sun, 11 Jul 2010 14:17:45 UTC
Thanks to TheRationalizer for the link
It has been a basic principle of evolution for more than a century that plants and animals can adapt genetically in ways that help them better survive and reproduce.
Now, in a paper to be published in the journal Science, University of Rochester biologist John Jaenike and colleagues document a clear example of a new mechanism for evolution. In previous well documented cases of evolution, traits that increase an animal's ability to survive and reproduce are conferred by favorable genes, which the animal passes on to its offspring. Jaenike's team has chronicled a striking example of a bacteria infecting an animal, giving the animal a reproductive advantage, and being passed from mother to children. This symbiotic relationship between host animal and bacteria gives the host animal a readymade defense against a hazard in its environment and thus has spread through the population by natural selection, the way a favorable gene would.
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- - PhysOrg.com Comments
Using a process called paleo-experimental evolution, Georgia Tech researchers have resurrected a 500-million-year-old gene from bacteria and inserted it into modern-day Escherichia coli (E. coli) bacteria. This bacterium has now been growing for more than 1,000 generations, giving the scientists a front row seat to observe evolution in action. Credit: Georgia Institute of Technology
- - Sense About Science 6 Comments
Welcome to this questions and answer session on cross fertilisation, which has also been called contamination, with Wendy harwood and Huw Jones.
Rothamsted Research - YouTube/Sense... 79 Comments
Add your support to the appeal from scientists at the publicly funded Rothamsted Research: Don't Destroy Our Research.
Edyta Zielinska - TheScientist 7 Comments
Genes shared across species that produce different phenotypes—deafness in humans and directional growth in plants—may reveal new models of disease.