PZ writes today in response to one typical objection to evolution, namely the claim that:
Mutations have NEVER produced additional DNA structures. NEVER! [Snip] I repeat… not a SINGLE scientist in the entire world has EVER recorded a mutation which produced additional DNA structures or material….
Note the absolute certainty expressed by the creationist – the absolute certainty of the totally ignorant religious believer (some redundancy there, it’s true), in the face of scientists who have spent their whole lives actually, you know, studying this stuff. PZ explains clearly that mutations can produce additional information:
I went to the Flybase database, for instance, and did a search for any duplicated alleles. It came back with a long list of them, and here is just the first one, an allele called abd-AUab-G1, which happens to be a Hox gene in the bithorax complex. Here’s the short description.
You want the full citation so you can go look up the details in the peer-reviewed scientific literature? Yeah, we can do that:
Bender and Fitzgerald (2002) Transcription activates repressed domains in the Drosophila bithorax complex. Development 129(21): 4923-4930.
Much more at the link.
Bookmark that link for the next time (and there will be a next time) some creationist fool claims mutations can’t create information and therefore evolution is impossible.
Edited to add:
PZ had a follow up post on this subject today, summarizing even more examples of how evolution produces more information – examples the creationists continue to ignore.