Once Susumu Ohno coined the term “junk DNA” and called it the remains of extinct genes1, junk DNA started to become the darling of the evolutionary community. First, it was seen as an effective argument against creationism or intelligent design. After all, why would the Creator put so much useless DNA into His creation? More importantly, however, it was considered an integral component of evolution. After all, evolution requires that genetic mutations acted on by natural selection produced genes with novel functions. However, it is difficult to expect that to work when the mutations occur in genes that the organism needs. Thus, one of the major mechanisms of genetic evolution involves gene duplication. In this view, a gene is duplicated, and one copy continues to produce the protein it always produced, while the other is free to mutate wildly. Waving the magic wand of time, the evolutionist then says that a large number of these mutating copies will become useless junk, but a small number of them will develop into novel genes. As you can see, then, junk DNA is integral to evolution, and according to evolution, most organisms should have a lot of it.
This, of course, is why Dr. Jerry Coyne says the following in his book, Why Evolution Is True:2,
When a trait is no longer used, or becomes reduced, the genes that make it don’t instantly disappear from the genome: evolution stops their action by inactivating them, not snipping them out of the DNA. From this we can make a prediction. We expect to find, in the genomes of many species, silenced, or ‘dead,’ genes: genes that once were useful but are no longer intact or expressed. In other words, there should be vestigial genes…Our genome—and that of other species—are truly well populated graveyards of dead genes.
Unfortunately for evolutionists, function is routinely being found for this supposed “junk DNA.” As a result, some evolutionists have realized that they need to back away from the claim that junk DNA is integral to the process of evolution.
Continue reading “Despite Their Protests, Evolutionist Do Depend on “Junk DNA,” and LOTS of It!”