Genetic Effects of Culture + Human-Chimp Interbreed?
The Impetus Of Paleozoic Multicelled Evolution
Natural Selection Is A Two-Level Interdependent Affair
Dov, in earlier posts:
1) Evolution, i.e. genome/genes modifications (“mutations”), inherently ever more of them as new functional options arise for the organism.
2) modifications of genome’s functional capabilities can be explained by the organism’s culture-life-experience feedbacks to its genome, its base organism. The route-modification selection of a replicating gene, when it is at its alternative-splicing-steps junction, is biased by the feedback gained by the genome, the parent organism, from the culture-life-experience of its progeny big organism. THIS IS HOW EVOLUTION COMES ABOUT.
3) The challenge now is to figure out the detailed separate steps involved in introducing and impressing the big organism’s experiences (culture) feedbacks on its founding parents’ genome’s genes, followed by the detailed separate steps involved in biasing-directing the genes to prefer-select the biased-favored splicing.
4) I find it astonishing that very few persons, non-professional as well as professional biologists-evolutionists, have the clear conception that selection for survival occurs on two interdependent levels – (a) during the life of the big progeny organism in its environment, and (b) during the life of its genome, which is also an organism. Most, if not all, persons think – incorrectly – that evolution is about randomly occurring genes-genome modifications (“mutations”) followed with selection by survival of the big progeny organism in its environment. Whereas actually evolution is the interdependent, interactive and interenhencing selection at both the two above levels.
Earth Life’s Timeline
Now, further about the scene that emerges from the above :
1) The first clear evidence of life, single-celled bacteria, has been evidenced since circa 3.5 BYA. The onset of the multi-celled ancient life forms is evidenced circa 542 MYA, in the Cambrian period during the Paleozoic era.
2) The age of the Earth is approximately 4.6 billion years, but it’s not always easy to grasp the concept of how old our planet really is. To give you an idea of where we fit into that vast span of time, imagine all those 4.6 billion years compressed into a single year. In such a time frame, the Precambrian Era (during which the first life forms evolved) would last from January 1 to mid-November; the Paleozoic Era (the age of invertebrates and primitive fishes) would take up the rest of November and part of December, while the Mesozoic (the age of dinosaurs) would take up most of the remainder of December. Our time, the Quaternary would occupy only the last four hours on New Year’s Eve.
– Life started in the form of single independent naked homeless genes,
– that evolved into genes aggregates and eventually into genomes,
– that evolved membraned cells to control their immediate environment,
– and then evolved the cell membranes into a multi-function organ sensing, reporting and utilizing the out-of-cell environment for the genome, i.e. doing its culture,
– thus starting the culture-life-experience feedback to the genome-genes for evolution,
– and then extending the innate genes’ cooperation to various forms of cells’ cooperation,
– i.e. to organs in multicelled organisms and to various forms of cells’ associations,
– and the more the consequent experiences and their feedbacks to the parent genomes the more the optional alternative-splicing-steps to the founding parent’s genomes…
Let’s remember that life and evolution is about genomes and genes. Each and all Organisms on Earth, including you and me, are creations-manifestations of the ever-evolving genes-genomes that came into being in the Proterozoic era. All of us are simply the products of their best efforts to survive…