A stochastic evolutionary model of molecular sequences.
A stochastic evolutionary model of molecular sequences is proposed. The basic forces in evolution are supposed to be mutation and selection. The concept is somewhat similar to Kauffman-Levin's concept of adaptive walks and corresponding analytical expressions have been developed. The selective force is divided into two parts: a slowly-varying part and a rapidly-changing fluctuation. The latter influences the distribution of sequences and results in an equation of motion along the flow line. The former plays a more important role in the emergence of evolutionary order. It is demonstrated that the asymmetry of selective forces would lead to a definite order of the system.
Luo
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Department of Physics, University of Toronto, Canada.
Trainor
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LE
D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D008957:Models, Genetic; D009711:Nucleotides / Q000235:genetics*; D012641:Selection, Genetic
D009711:Nucleotides