Blackwell Publishing

Molecular evolution and neutral theory - What is the neutral theory?

"It is becoming increasing clear that most molecular evolution is due to neutral drift. This does not mean the molecules we are talking about are useless, but there may be more than one alternative form of them. It doesn’t matter which one you have in order to do the job. So when a molecule mutates into another form which does the job just as well, natural selection doesn’t care."

Richard Dawkins

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