Article
The theory of facilitated variation.
Proceedings of the National Academy of Sciences of the United States of America - 15 May 2007
Gerhart John, Kirschner Marc
Abstract excerpt
This theory concerns the means by which animals generate phenotypic variation from genetic change. Most anatomical and physiological traits that have evolved since the Cambrian are, we propose, the result of regulatory changes in the usage of various members of a large set of conserved core components that function in development and physiology. Genetic change of the DNA sequences for regulatory elements of DNA,...
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