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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?

To: TigerPaw who wrote (1164)	8/13/2000 9:11:00 PM
From: TigerPaw	Read Replies (1) \| Respond to of 69300

Natural Selection The thesis that the struggle to survive will naturally select the strong or fittest over the weak or ill-adapted individual. But what is actually observed is that natural selection leads to stabilization of an existing species, not to a higher order - it counteracts transformation. Transformism Evolution that results in a new species in contrast to variations within a species (kind). As I attempted to say in the previous message, life under Natural Selection does tend to be static. What was good for the parent is most likely good for the child and so the mechanisms of reproduction make the most common genes dominant and changes recessive. An easy example is in humans where a brown eye pigment has been the norm for about 150 thousand years, but a blue eye pigment arose in specialized locals in probably the last 20-40 thousand years. Nearly all humans contain genes for the brown eye but only a few for blue, so in mating, blue eye characteristics tend to disappear (moving to green, dark green, then brown). This is not because one is better than the other, only that the brown eye characteristic has a longer gene history (and more gene copies in the chromosome) and so in the corrective mechanism of sexual reproduction the trait that is most common (dominate) is preferentially reproduced. It is only through breeding in relative isolation that new characteristics will become prevalent in a local population. TP