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Mechanisms of Evolution

Beyond Darwin and Neo-Darwinism

New Evidence For One-way Evolution

UCSD Biologists Find New Evidence For One-way Evolution: "Irreversible loss of complex traits, which result from the combined interaction of several genes, is an old and at times controversial scientific question. While the late evolutionary biologist Stephen Jay Gould popularized the hypothesis of irreversibility, known as Dollo's Law, studies that use current methods to reconstruct the evolution of complex traits often fail to support it. This is because it is often difficult to reconstruct characteristics of extinct ancestors with any certainty."

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