University of Würzburg, Physiological Chemistry I, Biocenter, Am Hubland, Würzburg, Germany.
Gene and genome duplications are considered to be the main evolutionary mechanisms contributing to the unrivalled biodiversity of bony fish. New studies of vitellogenin yolk proteins, including a report in BMC Evolutionary Biology, reveal that the genes underlying key evolutionary innovations and adaptations have undergone complex patterns of duplication and functional evolution.