Read e-book online Genetics and the Logic of Evolution PDF

By Kenneth M. Weiss

ISBN-10: 0471238058

ISBN-13: 9780471238058

During this ebook the authors draw on what's recognized, principally from contemporary examine, concerning the nature of genes and cells, the genetics of improvement and animal and plant physique plans, intra- and interorganismal communique, sensation and notion, to suggest few simple generalizations, besides the converted software of the classical evolutionary concept, gives you a broader theoretical knowing of genes, evolution, and the varied and complicated nature of residing organisms.

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In fact, organisms with a sequestered germ line are less likely to evolve such mechanisms because the mutations generated under stress would have to be inserted in the germ line and not just be in the body itself, yet it is the body that must survive the stress. Our current understanding is that evolution is not teleological, that is, it does not work with future objectives in mind. We may some day discover lamarckian means of genetic evolution, but until then we have to hold to our view that mutational change is random relative to need.

There is, however, still debate about how much actual horizontal transfer has occurred, centering on, among other things, the analytic methods used to identify possible transfer products in present-day cells and species. , Hartman and Fedorov 2002) that introduced the subcellular organelles mitochondria and chloroplasts into a cell. This was initially a symbiotic relationship (a mutually beneficial arrangement between otherwise self-standing entities) but eventually the descendant cells and organelles were unable to survive without each other.

Overall, the important characteristics of a machine are that it is prospectively and purposively designed and manufactured. However, the same biology that views organisms in this way unambiguously denies that organisms have come about through teleological, lamarckian processes. Instead, an organism is the product of contingent processes, not de novo design. An organism develops from the inside, rather than being assembled by an external factory, and it evolved by modifications of that process, which works on the whole organism and not part by part and without any end objective in mind.

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Genetics and the Logic of Evolution by Kenneth M. Weiss

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