Evolution of differentiated expression patterns in digital organisms

Details Evolution of differentiated expression patterns in digital organisms Evolution of differentiated expression patterns in digital organisms

2000-02-29

arxiv.org/abs/physics/0002054v1

Lect. Notes Artif. Intell. 1674 (1999) 129-138

Physics

Biological Physics

10 pages LaTeX, 4 figures. Appeared in "Advances in Artificial Life", 5th European Conference ECAL'99, D. Floreano et al, eds.

Scientific paper

We investigate the evolutionary processes behind the development and optimization of multiple threads of execution in digital organisms using the avida platform, a software package that implements Darwinian evolution on populations of self-replicating computer programs. The system is seeded with a linearly executed ancestor capable only of reproducing its own genome, whereas its underlying language has the capacity for multiple threads of execution (i.e., simultaneous expression of sections of the genome.) We witness the evolution to multi-threaded organisms and track the development of distinct expression patterns. Additionally, we examine both the evolvability of multi-threaded organisms and the level of thread differentiation as a function of environmental complexity, and find that differentiation is more pronounced in complex environments.

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