Abstract
Environmentally cued polymorphisms are hypothesized to evolve when the environment is coarse-grained and different genotypes are unable to choose the habitats in which they are most fit. InPapilio polyxenes, which has an environmentally cued pupal colour dimorphism, there is genetic variation in both tendency to produce brown or green pupae and preference for green- or brown-inducing pupation sites, but the two traits are not correlated.
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