Genetic Experimentation: The Adaptive Function of Sex and Conjugation Britt Hanson

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Published: April 17th 2013

Kindle Edition

152 pages


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Genetic Experimentation: The Adaptive Function of Sex and Conjugation  by  Britt Hanson

Genetic Experimentation: The Adaptive Function of Sex and Conjugation by Britt Hanson
April 17th 2013 | Kindle Edition | PDF, EPUB, FB2, DjVu, AUDIO, mp3, RTF | 152 pages | ISBN: | 8.53 Mb

The function of sex has long been a puzzle for neo-Darwinian theory. This book outlines a solution to it, along with the function of conjugation in lower organisms.That sex has been a puzzle should be an embarrassment for neo-Darwinian theory. ItMoreThe function of sex has long been a puzzle for neo-Darwinian theory. This book outlines a solution to it, along with the function of conjugation in lower organisms.That sex has been a puzzle should be an embarrassment for neo-Darwinian theory. It should also be a clue that something fundamental is wrong with the neo-Darwinian framework.According to neo-Darwinism, point mutations supply the genetic variation that is the raw material for evolution through natural selection.

In population genetics models, what evolves is the gene pool, as alleles displace rivals at the same slot on a chromosome.But the neo-Darwinian synthesis coalesced before the discovery of DNA and the advent of molecular genetics. Geneticists now know that evolution has occurred mostly through genetic rearrangements, often in regulatory regions of the genome, not via point mutations or allele displacement.It is now also known that rearrangements occur when chromosomes cross over during meiosis—a part of sex.

Meiosis and chromosome shuffling—which is also a part of sex—are evolved adaptations. The genetic consequences of these phenomena are not random, which is to say that they are not chance mutations. Given what is now known about the genome, genetic rearrangements could not plausibly be random.The hypothesis, then, is that sex is an evolved tool that directs genetic variation.

As a result, each and every sexually-produced organism is genetically unique—a genetic experiment.The book goes on to describe how organisms can direct variation, using an epigenetic model of an organism. (This model builds on a concept developed by the author in two separate books, Dynastic Theory: The Evolution of Altruism in Animal Societies and Epigenetic Evolution: A Theory of Cultural Evolution through Directed Creativity).

In an epigenetic model, an organism has a repertoire of developmental and adaptive possibilities stored in its DNA—a genetic “library,” accumulated in an organism’s line of descent. An organism can perceive its environment and reach into its repertoire for an adaptive response. In other words, organisms are intelligent. They are not strings of genes, as is supposed in the Mendelian model, selfish gene theory, and other neo-Darwinian concepts.The book concludes with a discussion of the philosophical implications of the theory of sex and conjugation as directed experimentation, including its distinction from neo-creationist theories of supernatural intelligent design.



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