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Relative abundance of “fuzzy” (F) morphs in the eight replicate UVR lineages over the course of the experiment. Lineages are sorted in descending order by highest recorded abundance of F morphs. Sampling was conducted every 10 generations with the exception of a gap between generations 310 and 360. Although F morphs emerged reproducibly within the first 60 generations of all eight UVR lineages, their abundance fluctuated relative to the ancestral “round” (R) type.
