Does Gene Duplication Perform As Advertised?

In my previous post, I highlighted a recent peer-reviewed paper which challenged a key tenet of neo-Darwinian evolution -- specifically, the causal sufficiency of gene duplication and subsequent divergence to account for the origin of novel biological information. In this follow-up blog, I want to consider some of the case-studies examined in the paper and relay some of the conclusions drawn.

The paper discusses the case of Sdic (which has been discussed on this blog before), a flagellar...