Here is what the page “Octopus and Cuttlefish Suckers Evolved by Repurposing Ancient Developmental Genes, Study F” contains. A new study from the University of Tokyo reveals that the intricate suckers of octopuses and cuttlefish likely evolved by repurposing ancient genes originally used for early embryonic development in mollusks. Researchers compared gene activity during embryonic development across cuttlefish, octopus, and snails, focusing on how arms and suckers form. They discovered that genes linked to appendage patterning in other animals were active along developing cephalopod arms, but not in the suckers themselves.
Instead, the suckers showed strong expression of Ets1, a gene known for its role in early mollusk development. This suggests cephalopods co-opted existing genetic machinery to create novel structures—a key insight into evolutionary innovation. The findings shed light on how complex body parts can arise from simple ancestors, with implications for understanding developmental biology and the evolution of animal diversity. This listing links straight to the original page, where the content is available in full.