why do changes in gene pools lie at the root of evolution?

Question

can anybody explain to me what is the relation between evolution and gene pools?

Answer 1

That is all that evolution is; the change in the genetic frequency of a populations gene pool. You may mean natural selection, which takes the mutational variation presented by the gene pool of population and selects those with the best reproductive success, who then pass on these successful variants to their children.

Pay no attention to the answer below, as it is creationist/ID propaganda from a person who does not understand how genetic information is increased and does not understand duplication of genes mutation at all.

Go here for more real information, devoid of creationist and ID nonsense, as the answer below is full of it.

http://www.talkorigins.org

Answer 2

If by evolution you mean milecules-to-man evolution then changes in gene pools has nothing to do with it.

If by evolution you really mean natural selection then, that is exactly what is behind natural selection. For example lions and tigers have a common ancestor (they can interbreed), yet they each have a subset of the original big-cat gene pool. Note that they each have less genetic information, so have in reality devolved.

Evolutionists often (deliberately) use the word evolution to mean 2 different things. They point to an example of NS (which happens and everyone agrees), and then say that is proof of (molecules-to-man) evolution - which is a hypothesis and everyone does not agree.

The key for evolution to have happened is for a vast increase in genetic information. The alleged mechanism is mutations, yet all observed mutations are information neutral or lossy.
NS does indeed act on mutations - and usually weeds them out since they are usually harmful.