Comment Re:Zergling Speed upgrade (Score 2) 59
There are two kinds of incremental change - small changes in gene expression/abundance/variation that give small outward changes, and small mutations that have big outward effects, e.g. six fingers on one hand, downs syndrome, sickle cell anemia. All those originally came from a single genetic misfire during replication. Who's to say wings didn't start from a physical step change that was a single base pair?