Evolutionary Baggage
978-613-3-83386-9
6133833866
164
2010-11-07
49.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Evolutionary baggage is the part of the genome of a population that was advantageous in past individuals but is disadvantageous under the pressures exerted by natural selection today. Genes that may have been advantageous in the past may be critically unfit for individuals in today’s environment. Natural selection is not a perfect process; if an organism is “fit enough” to survive a particular environment and reproduce, its genes are passed on to the next generation. Some of these genes may increase an organism’s fitness while some may even be slightly disadvantageous. This seeming paradox is the origin of evolutionary baggage, which is the collectively inherited traits that evolved in a different environment from the present. The result is a “Paleolithic” genome, which is not adapted to today’s environment and is contributing to “diseases of civilization,” including atherosclerosis and obesity. Other hypotheses link evolutionary baggage to genetic diseases. Since all organisms descended from a common ancestor, evolutionary baggage can be seen universally among organisms.
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