Minimal model for genome evolution and growth

Details Minimal model for genome evolution and growth Minimal model for genome evolution and growth

2002-06-11

arxiv.org/abs/physics/0206024v1

Physics

Biological Physics

gzip file (LaTeX source and 5 .ps file for figures), 4 pages, 5 figures, 1 table

Scientific paper

10.1103/PhysRevLett.90.018101

Textual analysis of typical microbial genomes reveals that they have the statistical characteristics of a DNA sequence of a much shorter length. This peculiar property supports an evolutionary model in which a genome evolves by random mutation but primarily grows by random segmental self-copying. That genomes grew mostly by self-copying is consistent with the observation that repeat sequences in all genomes are widespread and intragenomic and intergenomic homologous genes are preponderance across all life forms. The model predicates the coexistence of the two competing modes of evolution: the gradual changes of classical Darwinism and the stochastic spurts envisioned in ``punctuated equilibrium''.

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