_:b665100453 . _:b665100453 "1:many orthology that involves a gene in species A and its ortholog in species B, when duplications more recent than the species split have occurred in species A but not in species B." . _:b665100453 . _:b665100453 . _:b665100453 . _:b665100453 . _:b665100453 . _:b665100453 . _:b665100453 .