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Politics : Evolution
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To: TigerPaw who wrote (1378)5/25/2006 7:33:20 PM
From: Brumar89  Read Replies (1) of 69300
 
The key thing that a breeder does is keep the "purebred" lifeforms isolated.

Breeders preserve purebred strains of course. But that's hardly the "key thing" they do. They cross strains and selectively breed the crossed progeny for the traits they want.

The same technique works in natural selection, except that complete isolation of a breeding subset is rather rare in nature. Usually the lifeforms mix it up pretty indiscriminately blending out the traits.

Actually nature is filled with a wide variety of subspecies and all sorts of variants - "breeding subsets" as you call it. A few examples - the two species of elephants in Africa (something scientists only figured out in the last few years), the several varieties of zebras and chimps on that continent.
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