N.Wells
Posts: 1836
Joined: Oct. 2005
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| Quote (GaryGaulin @ Jan. 21 2016,21:07) | | Quote (N.Wells @ Jan. 21 2016,09:10) | | I do not have an "evolution by natural selection" paradigm. I have have been at pains to say since the beginning of this thread, I have a paradigm of evolution by mutation, recombination, drift, and natural selection. |
Groovy. I get the drift, man.
Seeing I'm hip with all that I'll give two empirical everyday examples of what is clearly intelligent and what is not:
Intelligent = "A functional human."
UnIntelligent = "A box of hammers."
Now it's your turn to lay it all on the line with two empirical everyday examples for how your opposites work:
Natural Selection = "?"
UnNatural Selection = "?" |
You are again showing your lack of understanding of natural selection, because there is no "opposite" (you might as well ask what the "opposite" of genetic drift is) and "unnatural selection" is not a defined concept. Nonetheless,
A) Natural selection = differential reproductive success attributable to inheritable genetic factors (and the resultant changes in allele frequencies in succeeding generations). Examples:
1) Differential reproductive success of Geospiza individuals due to body size and beak size under various conditions of food availability on Daphne Major in the Galapagos
2) Differential reproductive success in male Poecilia due to spot size and colors under constant female preference but various intensities of predation,
3) Differential reproductive success in 142 female sparrowhawks over 13 years
and so many, many more well-documented studies.
B) Changes in gene frequencies due to chance, i.e. unrelated to differences in genotype, = genetic drift of various sorts such as founder effects and bottlenecks, which are not equivalent to natural selection. A good example is the genetic differences that built up in six populations of the nene in Hawaii.
Artificial selection (i.e. intentional selection of breeding pairs by people for specific attributes) is also not natural selection. Examples = dogs, breeds of sheep, breeds of cattle, Brassica, varieties of fruit trees (pears, plums, apples, etc.), and so forth.
(Edited to add: Note, the extreme muscle developments in bully whippets and Belgian Blue and Piemontaise cattle are due to mutations, rather than selection.)
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