Uncommon Descent Serving The Intelligent Design Community

Where could we have learned but from Phys.org …


… that the human race was shaped by “an evolutionary arms race” with itself?

Their findings, published September 28 in Nature, show that over evolutionary time, primate genomes have undergone repeated episodes in which mutations in jumping genes allowed them to escape repression, which drove the evolution of new repressor genes, and so on. Furthermore, their findings suggest that repressor genes that originally evolved to shut down jumping genes have since come to play other regulatory roles in the genome.

“We have basically the same 20,000 protein-coding genes as a frog, yet our genome is much more complicated, with more layers of gene regulation. This study helps explain how that came about,” said Sofie Salama, a research associate at the UC Santa Cruz Genomics Institute who led the study. More.

Well, yeah. And there’s about the same amount of metal in a top of the line computer as there is in 100 empty cat food tins.

The difference is the amount of design involved. The purposes intended, and all that. But they aren’t supposed to (and don’t) get into that.

See also: Human origins: The war of trivial explanations

Follow UD News at Twitter!

as to:
“We have basically the same 20,000 protein-coding genes as a frog, yet our genome is much more complicated, with more layers of gene regulation."
Actually, contrary to what they believe for the plasticity for gene regulatory networks, as Stephen Meyer pointed out in Darwin's Doubt,,,
Stephen Meyer - Responding to Critics: Marshall, Part 2 (developmental Gene Regulatory Networks) - video https://www.youtube.com/watch?v=Cg8Mhn2EKvQ
,,,changes to developmental Gene Regulatory Networks are 'always catastrophically bad',,
A Listener's Guide to the Meyer-Marshall Debate: Focus on the Origin of Information Question -Casey Luskin - December 4, 2013 Excerpt: "There is always an observable consequence if a dGRN (developmental gene regulatory network) subcircuit is interrupted. Since these consequences are always catastrophically bad, flexibility is minimal, and since the subcircuits are all interconnected, the whole network partakes of the quality that there is only one way for things to work. And indeed the embryos of each species develop in only one way." - Eric Davidson http://www.evolutionnews.org/2013/12/a_listeners_gui079811.html
Dr. Nelson explains why changes to developmental Gene Regulatory Networks are 'always catastrophically bad' in the following video,,
Darwin or Design? - Paul Nelson at Saddleback Church - Nov. 2012 - ontogenetic depth (excellent update) - video Text from one of the Saddleback slides: 1. Animal body plans are built in each generation by a stepwise process, from the fertilized egg to the many cells of the adult. The earliest stages in this process determine what follows. 2. Thus, to change -- that is, to evolve -- any body plan, mutations expressed early in development must occur, be viable, and be stably transmitted to offspring. 3. But such early-acting mutations of global effect are those least likely to be tolerated by the embryo. Losses of structures are the only exception to this otherwise universal generalization about animal development and evolution. Many species will tolerate phenotypic losses if their local (environmental) circumstances are favorable. Hence island or cave fauna often lose (for instance) wings or eyes. http://www.saddleback.com/mc/m/7ece8/
Moreover, as was hinted at in the OP,,,
“We have basically the same 20,000 protein-coding genes as a frog, yet our genome is much more complicated, with more layers of gene regulation."
It is in the developmental Gene Regulatory Networks where the greatest differences between species are found,,,
"Where (chimps and humans) really differ, and they differ by orders of magnitude, is in the genomic architecture outside the protein coding regions. They are vastly, vastly, different.,, The structural, the organization, the regulatory sequences, the hierarchy for how things are organized and used are vastly different between a chimpanzee and a human being in their genomes." Raymond Bohlin (per Richard Sternberg) - 9:29 minute mark of video http://www.metacafe.com/watch/8593991/ Gene Regulation Differences Between Humans, Chimpanzees Very Complex – Oct. 17, 2013 Excerpt: Although humans and chimpanzees share,, similar genomes (70% per Tomkins), previous studies have shown that the species evolved major differences in mRNA expression levels.,,, http://www.sciencedaily.com/releases/2013/10/131017144632.htm Evolution by Splicing - Comparing gene transcripts from different species reveals surprising splicing diversity. - Ruth Williams - December 20, 2012 Excerpt: A major question in vertebrate evolutionary biology is “how do physical and behavioral differences arise if we have a very similar set of genes to that of the mouse, chicken, or frog?”,,, A commonly discussed mechanism was variable levels of gene expression, but both Blencowe and Chris Burge,,, found that gene expression is relatively conserved among species. On the other hand, the papers show that most alternative splicing events differ widely between even closely related species. “The alternative splicing patterns are very different even between humans and chimpanzees,” said Blencowe.,,, http://www.the-scientist.com/?articles.view%2FarticleNo%2F33782%2Ftitle%2FEvolution-by-Splicing%2F
Thus, where Darwinian theory most needs plasticity in order to be viable as a hypothesis, i.e. in developmental gene regulatory networks, is the place where it is found to be least flexible, (always catastrophically bad!). Yet, it is in these developmental gene regulatory networks where the greatest differences are found! As PaV would say, 'Another Day, Another Bad Day for Darwinism'!bornagain77
September 28, 2014
01:11 PM

Leave a Reply