In both insects and mammals, most ORNs express only one specific odorant receptor, and the axons of ORNs that express the same odorant receptor project to the same glomerulus. Is this similarity in organization likely to be due to shared ancestry or to convergent evolution? Briefly explain your reasoning.

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The Answer of In both insects and mammals, most ORNs express only one specific odorant receptor, and the axons of ORNs that express the same odorant receptor project to the same glomerulus. Is this similarity in organization likely to be due to shared ancestry or to convergent evolution? Briefly explain your reasoning.

In Both Insects and Mammals, Most ORNs Express Only One