A rising trend among creationists/intelligent design advocates is to imply, or state outright, that all DNA (i.e., junk DNA/noncoding DNA) has function. While this is already demonstrably untrue, many such folk maintain this line, including Jonathan Wells in his new book, 'The Myth of Junk DNA'. [The book is at Amazon of course, and the comments on that page are interesting -- Faith].I'm always surprised to find creationists arguing that junk DNA must have a function. I suppose some of it may retain some function after all, I haven't studied the science involved, but its not having a function makes it compatible with the Biblical scenarios of the Fall and the Flood, which imply so much death, and that's how I've been thinking of it for some time -- as the DNA cemetery. Death entered the world because of sin. It makes sense the DNA would die too. The creationist arguments for its functionality are probably due to the fact that evolutionists have claimed its nonfunctionality supports evolution, but really it supports Biblical creation better.
On a related note, it is claimed by YEC/IDC 'information' types that functional DNA possesses CSI, and further they claim that CSI is indicative of creation/design. Further, I have been told by a YEC that CSI is determined by calculating the Shannon information of the DNA sequence (which is a function of its number of base pairs) and adding its 'meaning' which is premised on its function (I've been trying to get creationist information types to tell me how to quantify 'meaning' for some time, but to no avail).
Taking the YEC/IDC position to its logical conclusion, this must mean that an organism with a genome larger than humans possess more CSI than humans do.
Thus, the marbled lungfish, with a genome of 133 billion bps, has ~44 times the CSI [something "specific information" -- Faith] that humans do (if YEC/IDCs are correct).
Which means that the Creator/Designer put more effort into creating them than us.
How can YEC/IDCs reconcile this with their beliefs that humans are 'special'?
I mean without special pleading....
Evolutionists have claimed that junk DNA is evidence for evolution because it must reflect the many genetic trials by natural selection that didn't work out in the long history of evolution (or possibly, the record of previous adaptations that were later obsolesced?) I dunno, seems to me that given the enormously long history they postulate, 98% of the DNA is an awfully small record to show for it, it ought to be more like 99.9999999%. But the idea that 98% of human DNA is functionless or dead is perfectly compatible with the biblical history of the Fall in Eden and the Flood of Noah, as it could be regarded as a record of all the death that was the result of those events, and the time period of 4500 years since the Flood bottleneck is a more reasonable number than millions of years too of course.
[Aug 12, want to add here that at EvC someone or other is always claiming that if there had been a bottleneck 4300 or so years ago that would be apparent in the DNA. I've never caught anyone saying exactly what in the DNA would indicate such a bottleneck, so I can only just shrug off such comments until they do, and since they habitually think in terms of millions of years and can't seem to help themselves, whatever they come up with would have to be taken with a great deal of skepticism anyway. But the Junk DNA seems to me to be a fine indicator of such a bottleneck.]
As for marbled lungfish or any other creature with a genome larger than the human, that also has to be explained by the Fall and the Flood. It doesn't reflect Creation but the destruction after the Fall, and Creationists should recognize this. Some creatures were less affected by the fall of humanity and God's judgment than others, and would have retained more genetic vitality for that reason. The land creatures that were taken on the ark probably lost about the same amount of DNA for their Kind as the people on the ark did, but sea creatures either lived or died without benefit of the ark, and some no doubt survived in greater numbers than others and retained more living DNA for that reason.
Yes, this is all just speculative musing on my part and I can't very well insist on it, it just seems to fit the biblical account while the claim of functionality for the junk DNA doesn't.