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Author Topic:   Does the Darwinian theory require modification or replacement?
Member (Idle past 3051 days)
Posts: 706
From: Joliet, il, USA
Joined: 08-31-2010

Message 1 of 2 (608969)
03-15-2011 4:03 PM

I propose that we are now entering into a new era of the theory of Evolution. This may be called the Information driven theory, the Bio-Communicative theory, the Cell Intelligence theory of Evolution, or whatever appropriate name fits the theory.
The History of evolution began with Darwin and his theory of descent with modification, the origins of hereditary variation or random mutations, and natural selection.
Darwin’s theory was based upon gradual change and positive natural selection.
Next came the Neo-Darwinism or the Modern Synthesis in the 20th century which basically combined Darwinian gradualism with genetics. Again the theory was basically random mutation and natural selection.
Both of these theories rely on mechanical forces, Physical and Chemical, and reductionism.
In a post in the Forum Biological Evolution I introduced James A. Shapiro’s 21 st Century Natural Genetic Engineering writings in the potential falsifications of the theory of evolutionthread.
Shapiro’s work is based upon discoveries from genome sequencing such as genome alterations in key places in evolutionary history, horizontal transfers of DNA segments, Whole Genome Doublings etc.
He states that the cellular information in the genome is a Read-Write memory system, which is different from the modern synthesis view of the genome as a Read only memory system subject only to accidental change.
Shapiro is of the opinion that Mobile DNA movements rather than replication errors serve as the primary engines of protein evolution.
He writes at page 8 of the above cited paper;
One of the traditional objections to Darwinian gradualism has been that it is too slow and indeterminate a process to account for natural adaptations, even allowing for long periods of random mutation and selection. A successful random walk through the virtually infinite dimensions of possible genome configurations simply has too low a probability of success [155] . Is there a more efficient way for cells to search 'genome space' and increase their probability of hitting upon useful new DNA structures? There is, and the underlying molecular mechanisms utilize the demonstrated capabilities of mobile DNA and other natural genetic engineering systems
At page 9 he writes;
The second major aspect of evolutionary change by natural genetic engineering is that it generally takes place after an activating event which produces what McClintock called a 'genome shock' [160] . Activating events include loss of food [18] , infection and interspecific hybridization (Tables 3 and 4) - just the events that we can infer from the geological and genomic records have happened repeatedly. Episodic activation of natural genetic engineering functions means that alterations to the genome occur in bursts rather than as independent events. Thus, novel adaptations that require changes at multiple locations in the genome can arise within a single generation and can produce progeny expressing all the changes at once. There is no requirement, as in conventional theory, that each individual change be beneficial by itself. The episodic occurrence of natural genetic engineering bursts also makes it very easy to understand the punctuated pattern of the geological record [161] . Moreover, the nature of activating challenges provides a comprehensible link to periodic disruptions in earth history. Geological upheavals that perturb an existing ecology are likely to lead to starvation, alteration of host-parasite relationships and unusual mating events between individuals from depleted populations.
Shapiro is not alone in advocating a change in evolutionary theory from the modern synthesis as now expressed, to one of Natural Genetic Engineering.
My purpose in this post is to discuss whether the Modern synthesis as it is know today should be modified? Replaced? With A theory based upon adaptations that are directed, modified, regulated and controlled by information exchanges in the cell rather than by mechanical physical, chemical driven adapations driven by random mutations and natural selection.

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Message 2 of 2 (609046)
03-16-2011 8:51 AM

Thread Copied to Biological Evolution Forum
Thread copied to the Does the Darwinian theory require modification or replacement? thread in the Biological Evolution forum, this copy of the thread has been closed.

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