Scientists identify genetic switch for butterfly color vision
Researchers at the University of California San Diego discovered a genetic modification that gave butterflies an extra light-detecting cell in their eyes.
Extra cell improves color sight
Most insects possess eight light-detecting cells arranged behind each lens of their compound eye. Butterflies are the rare exception because they evolved a ninth photoreceptor to see more colors. This additional cell allows them to locate nectar and potential mates more effectively than flies.
Study published in Science Advances
The team led by Michael Perry identified the specific genetic steps involved in this evolutionary change. Their findings were published recently in the journal Science Advances regarding painted lady butterflies. The study explains how this rare break from the norm occurred during insect evolution.
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