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Curr Opin Genet Dev. 2008 Dec;18(6):479-92. doi: 10.1016/j.gde.2008.12.002. Epub 2009 Jan 17.

Genomics and the evolutionary origins of nervous system complexity.

Author information

1
Ecology Evolution and Marine Biology, University of California, Santa Barbara, CA 93106, USA. oakley@lifesci.ucsb.edu

Abstract

Advances in genomics are leading to increased understanding of the evolution of complexity, especially by beginning to bridge genotype and phenotype. Here, using examples from nervous system evolution, we define general patterns of increased complexity seen across levels of biological organization. We also explore specific evolutionary mechanisms that increase complexity, namely those that increase the number of biological units (parts) in a system. We provide specific neurobiological examples of increased complexity in genes, gene networks, cell types, and tissues/organs. These examples illustrate that while a variety of different mechanisms increase biological complexity, they can be understood in a generalized comparative framework.

PMID:
19152785
DOI:
10.1016/j.gde.2008.12.002
[Indexed for MEDLINE]

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