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DescriptionEnhanced pre-zygotic isolation in Drosophila (allopatric & sympatric plots-vert).png
English: Allopatric (red) and sympatric (blue) Drosophila species pairs plotted against level of pre-zygotic isolation and genetic distance (evolutionary age). Gradients indicate the the predictions of reinforcement for allopatric and sympatric populations. Based on Coyne and Orr (1997).[1]
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