Visualizing Evolutionary Activity of Genotypes

Mark A. Bedau and C. Titus Brown

Working Papers from Santa Fe Institute

Abstract: We introduce a method for visualizing evolutionary activity of genotypes. Following a proposal of Bedau and Packard[11], we define a genotype's evolutionary activity in terms of the history of its concentration in the evolving population. To visualize this evolutionary activity we graph the distribution of evolutionary activity in the population of genotypes as a function of time. Adaptively significant genotypes trace a salient line or "wave" in these graphs. The quality of these waves indicates a variety of evolutionary phenomena, such as competitive exculsion and random genetic drift. We apply this method in an evolutionary model of self-replicating assembly language programs competing for room in a two-dimensional space. Comparison with fitness graphs and with a neutral analogue of this model shows how this method highlights adaptively significant events.

Keywords: Evolution; adaptation; artificial life; Tierra; Avida (search for similar items in EconPapers)
Date: 1998-03
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Persistent link: https://EconPapers.repec.org/RePEc:wop:safiwp:98-03-023

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