In a recent study, researchers have uncovered new clues about the evolution of paired appendages. The study found that the emergence of paired appendages, such as arms and legs, was likely due to a single genetic event that occurred early on in the evolution of vertebrates. By studying the genetic basis of paired limb evolution, the team was able to identify a gene that is crucial for the formation of paired appendages. The team believes that the gene, which they have named Limbs, is responsible for the emergence of paired appendages in vertebrates, and may be the key to understanding the development of complex anatomy in all animals.

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source: Phys.org