[QUOTE]Originally posted by Cobra_snake:
[B]I am reading through "29 evidences for Macroevolution." I will discuss them in groups. First up:
"One True Polygenic Tree"
#1
"According to the theory of common descent, modern living organisms, with all their incredible differences, are the progeny of one single species in the distant past. In spite of the extensive variation of form and function among organisms, several fundamental criteria characterize all life."...
Well, to tell you the truth, I don't want to falsify this claim because it fits perfectly to a Creation model. I strongly predict that a foreign, non-nucleic acid of genetic material will be found as well. My reason? Common creator, common system of creating. There is no reason to suspect God would stray to far from the near-perfect system of DNA he created when he developed new species.[UNQUOTE]
"stray too far", "near-perfect system". Well I suppose that provides plenty of wriggle room. But how does that reconcile with the reality of variation in the genetic code?
Robin D. Knight, Stephen J. Freeland and Laura F. Landweber (2001) "REWIRING THE KEYBOARD: EVOLVABILITY OF THE GENETIC CODE," Nature Reviews - Genetics. 2: 49-58.
This is a paper which consolidates the variations which have been found in the genetic code used a number of organisms. For exmple, the UAA and UAG codons have been reassigned from Stop to Gln in some diplomonads , in several lineages of ciliates and in the green alga Acetabularia acetabulum.
A diagram of the relationship between the variants and the standard genetic code is at
http://www.ncseweb.org/resources/articles/7705_pr89_10182001__di_fails_aga_10_18_2001.asp
This raises some interesting questions for creation and/or design. Why would the designer make some variations of the genetic code for some taxa? Is it intelligent to have slightly different codes operating across taxa? Were the organisms created with the variant codes or did their divergence from the standard genetic code occur after their creaton?
Why would an intelligent designer create a "near perfect" genetic system when, presumably with a little more effort, a perfect genetic system could surely be provided? Does this mean that the capacity for mutation is designed into the genetic system? What would be the purpose of facilitating mutation? To provide variation within species to enable them to be more fit for their environment?
Cobra, you may need to revisit this piece of evidence before charging onto the others.