A study led by the University of York and the Wellcome Sanger Institute has unveiled that evolution is not entirely random, as butterflies and moths have utilized the same two genes, ivory and optix, for over 120 million years to create similar warning colors. This phenomenon, known as mimicry, occurs among distantly related species in South American rainforests, which share strikingly similar wing patterns that signal toxicity to predators. The researchers found that instead of changing the genes, evolution modifies the regulatory elements that control gene activation. Professor Kanchon Dasmahapatra noted that this study highlights the predictability of evolution, showing that these species have repeatedly relied on the same genetic mechanisms throughout their evolutionary history. Professor Joana Meier emphasized that these shared warning colors are beneficial, as they help other species display similar patterns, enhancing survival against predators. The findings, published in PLoS Biology, suggest that understanding these genetic pathways could enable scientists to better predict how species might adapt to changing environments.