"Interesting. Please elaborate. I remember reading something about this a year or so ago, but I've looked and there's not much information available. Thanks, MM"
Mapping genomes is just now giving us the raw data required for this proof/disproof.
Pick 3 sequentially "evolved" species with the same alleged common ancestor. The oldest species A has "gene 451." Species A supposedly branches into Species B, which has no trace of gene 451. Species B then purportedly branches into Species C, which *has* gene 451.
That would be code skipping, something beyond the ability of Common Descent to explain; it would falsify, conclusively, Evolutionary Theory (though no doubt the last holdouts of Darwinism will retreat to a viral defense to attempt to explain such code skipping)...
...On the other hand, we see code skipping in intelligently designed software all of the time. Re-using old code, even years later, is common, though numerous software programs written in between such re-uses of particular code won't always have such programming routines.
Code skipping is therefor common under ID, but ridiculous under ET. Genes that have disappeared in one species do not suddenly re-evolve back into a new child species.