How is the emergence of a new gene pinpointed in the fossil record?

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Sami asked the Naked Scientists:
How can scientists date the appearance of a certain gene or an allele if it isn't responsible for a phenotypically perceptible characteristic on a fossil (skin colour in humans for example)?

What do you think?
« Last Edit: 26/01/2010 14:30:02 by _system »


Offline JimBob

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This really has nothing to do with fossils. It is really a question about dating the development of genetic diversity. Because of this I think I will move it to "Plant Sciences, Zoology & Evolution"
The mind is like a parachute. It works best when open.  -- A. Einstein