Posts Tagged ‘dna sequences’

Titlu original: The Language of God – A Scientist Evidence for Belief
Autor: Francis S. Collins
Traducător: –
Editura: Free Press
Anul apariţiei: 2006
ISBN: 0-7432-8639-1
Preț: 10 $


 Recenzie de Valentin Teodorescu

– Primele două părți ale recenziei pot fi citite aici și aici

If in the area of the transitional fossils and the evolutionary mechanism dr. Collins does not seem (to us) very convincing – and some of his critics explain that evaluation by his eventual lack of close familiarity with the critical literature in this direction (due to the fact that this is not his area of specialty) -, what can we say about his arguments coming from his area of expertise, the Human Genome?

Here his arguments seem to be more powerful indeed: for example, he argues that the existence of some repetitive elements – which originated, in his opinion, in some “jumping genes”, and which could be found in the same places in the mouse’ and human’ genome – is a proof of a common ancestor between humans and mice. He affirms that, although some of these kinds of elements might be functional – and not Junk DNA sequences –, this cannot be the case with the aforementioned example, because there are, in the case of the mouse and the humans, some repetitive elements which became one-legged – losing a part of their AND sequence, and, as result, losing any possibility of functioning. In many cases, observes Collins, these one-legged elements are found in parallel positions in human and mouse genome. This seems to be a proof of their common descent, because this process can happen only during the migration of a jumping gene – when the respective process cripples this gene.

Another argument refers to some pseudogene cases (gene with one or more defects which make their original information useless). For example, the caspase-12 gene of the chimpanzee and mouse functions perfectly, but that of the humans does not: why would God insert a non-functional gene right in this place?

And last but not least, the difference between the 23 chromosomes pears of the humans and the 24 chromosomes pears of the chimpanzee seems to be the result of a fusion between two chromosomes of medium size of the chimpanzee, 2A and 2B, which resulted in the chromosome 2 of the human. The fact that those sequences are found exactly where the theory of evolution has predicted seems to confirm the idea of a Common Ancestor.

How could we answer to these real and serious challenges to the Creationist model – which clearly would suggest (at least) the truth of the “Common Ancestor” hypothesis? (mai mult…)

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