[aruanan]

The San Diego team used brine shrimp to prove a simple mutation here suppressed 15% of the limb development in the animal's central body region.

This would have allowed its ancestors, which had limbs on every segment of its body to lose their hind legs and evolve into six-legged insects.

This just posits that a "mutation" suppressed a percentage of limb development on a hypothetical earlier ancestor of the shrimp allowing some offspring to turn into insects while others evolved into shrimp. It's still begging the overall question. This is common in discussion of any gene families. The simplest member of the gene family in question is assumed to have been the original and the others which are longer are assumed to represent various combinations of duplications, deletions, point mutations, and frame shifts. Once the just-so story has been contrived, it is then accepted as evidence for that which has previously been assumed in order to devise the story in the first place.

What is even more interesting than the "this defect resulted in an impaired body plan" story above is the fact that whereas every organism (even single-celled organisms) is chock full of molecular apparatuses (organelles--such as the rotary motor that drives the flagella of some single celled organisms; various ports on the nuclear membrane of eukaryotes; etc., etc.) that are formed by the interaction of varied protein subunits whose DNA templates are found in diverse genomic locations, there are no such templates for the overall apparatus itself, much less for the intersystemic complementarity that exists between them.

[Nebullis]

...there are no such templates for the overall apparatus itself, much less for the intersystemic complementarity that exists between them.

Have you ever seen a termite mound? There are no architectural blueprints for such a mound. Nor is there one termite or even a panel of termites directing the others. Each termite is aware only of its surroundings and has no idea of the large project it is involved in. It just carries on according to a few rules of interaction between it and its immediate environment. Yet, a structural, complicated whole emerges.