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nmgauss
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In my college courses in evolution and biogeography, we learned that forming gene pools in isolated reproductive environments can lead to diversion. In the Southern Hemisphere, fossil evidence has revealed that camels and llamas are related. The fact that there are no camels in South America and no llamas in Africa is explainable by the theory of continental drift. That is, at one time, Africa and South America were once one land mass allowing pre-camels and pre-llamas to interbreed. But once South America split from Africa, genetic drift occurred resulting in different species on each continent.Another buffalo prediction coming true. In past posts I have predicted that as we learn more about the genome we will be better able to classify species. Now here is a paper just published that is showing just that. This is more support for IDvolution.
Proteins and Genes, Singletons and Species
Recent experimental data from proteomics and genomics are interpreted here in ways that challenge the predominant viewpoint in biology according to which the four evolutionary processes, including mutation, recombination, natural selection and genetic drift, are sufficient to explain the origination of species. The predominant viewpoint appears incompatible with the finding that the sequenced genome of each species contains hundreds, or even thousands, of unique genes – the genes that are not shared with any other species. These unique genes and proteins, singletons, define the very character of every species. Moreover, the distribution of protein families from the sequenced genomes indicates that the complexity of genomes grows in a manner different from that of self-organizing networks: the dominance of singletons leads to the conclusion that in living organisms a most unlikely phenomenon can be the most common one. In order to provide proper rationale for these conclusions related to the singletons, the paper first treats the frequency of functional proteins among random sequences, followed by a discussion on the protein structure space, and it ends by questioning the idea that protein domains represent conserved units of evolution.
The same sort of phenomenon was observed by Darwin in the Galapagos Islands. Significant differences in finches from island to island revealed this pattern.
Cluster analysis has been used to distinguish species. Many phenotypic characteristics are arranged in matrices and analyzed mathematically to arrive at discrete species. Sometimes the similarities are too great to arrive at separate species, in which case, the discrete entities are defined as variations within the species. This is essentially what Darwin did, but without the benefit of cluster analysis.