Makes No Senseinformed his readers that the universal genetic code indicates common descent from a single ancestor:
It is the near-universality of this code … that gives us confidence that modern life traces back to a single ancestor. If there was more than one origin of life, and its descendants independently developed the DNA—>protein system, it would be very unlikely that all modern species would have the same code.
In other words, we find the same DNA code in all the species, therefore they must have evolved from a common ancestor which had that code. The same elaborate code would not have evolved more than once.
Sorry but evolutionists cannot even explain how the DNA code evolved, period. In fact the universality of the code, according to evolutionary theory, means that it is essentially impossible to change. Over billions of years and billions of species, evolution hasn’t been able to nudge the code. The DNA code is one of the most extreme examples of a conserved design in all of biology. It is biology’s Rock of Gibraltar—it cannot normally be changed.
But if the code cannot be changed, then how did it evolve in the first place? The very universality which Coyne celebrates undercuts the theory Coyne is so sure is a fact.
Imagine the gradual evolutionary steps leading to the DNA code. In the penultimate step, the code was slightly different. And in the step before that, it was a slightly more different code. And so forth. The code must have been evolving—it must have been changing. And yet suddenly the code could no longer evolve. It makes no sense and, beyond hand-waving, evolutionists have no explanation for it.
Furthermore the code is also unique and special. It has several profound properties that are very helpful. For instance its arrangement is such that the effects of copying errors are minimized. Not only did the code just happen to evolve in early evolution, evolution just happened to find a one-in-a-million code.