Disclaimer: If you believe in creation, that's fine. I'm not saying you're wrong. This is a compacted explanation of evolutionary theory , and not meant to be taken as a anything more than as a possible explanation for certain phenomenon seen in the natural world.
Okay, I'll start with the basic explanation of Darwin's theory of 'natural selection'. Whoever said that the fossil record disproved this theory, please provide a link to where you got that information, because that doesn't make sense to me.
According to the textbook "Animal Behavior", by John Alcock, eighth edition:
Darwinian Theory: evolutionary change is inevitable if just 3 conditions are met:
1) Variation (having different genes has a noticeable effect on behavior, color, etc)
2) Heredity (the variation is genetic and can be passed down from generation to generation)
3) Diffferences in reproductive success (Having the different genes enables the organism to reproduce better or worse than others of the same species)
It is important to note: Selection cannot create the best of all possible genes for a particular task, but has to wait for mutations to occur by chance; only then can it winnow out the less effective alleles (genes). If a "better" allele does not appear, there is nothing selection can do about it, because selection is a consequence of the confluence (converging influence) of certain conditions, NOT a controlling force that acts for the good of the species.
So, using logic based on this, we can assume a few things about ball pythons:
* their evolutionary history produced the snakes we see today. The ancestors of ball pythons survived longer and reproduced more if they more closely resembled the snakes we see now.
* The fact that morphs are not more prevelant means that either they are not more successful in finding mates or that their appearance is relatively recent
I would like to point out - white animals stick out at night against any backdrop that is not snow, sand, or rock. Test this - have a friend put on a black shirt and go outside and hide at night. You probably won't find them. However, have them change into a white shirt...Predators that rely on sight to hunt would spot the white easily (which is why you so rarely see adult albinos in the wild). Albinism would not matter if the predator used difference senses to hunt with.
So, maybe in 10,000 years, all ball pythons will be pastels or spiders. Maybe, though, being a pastel or spider provides no real reproductive advantage, and in 10,000 years balls will still look like they do today.
In any case, we're not likely to see much of a change in the general appearance of the wild version of the species in our lifetime.

~jenny
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"Polysyllabism in no way insures that what you're saying is actually worth being heard." - Blake (an e-friend of mine)
"I have never made but one prayer to god, a very short one: "O lord, make my enemies ridiculous." And he granted it." - Voltaire



you are correct, animals adapt and inherit some traits from previous generations. But MACRO-evolution, (the theory / religion that has man evolving from a rock and random chemicals over 4.6 billion years) is pure fantasy. No reptile breeder has ever hatched out a chicken from a pastel x spider breeding, and they never will, because animals can only produce offspring OF THEIR OWN KIND. And besides, the evolution "theory" calls for IMPROVEMENTS (eg, ape turns into man), but all the changes we see would be LOSSES of information (eg, man losing his tail (that would actually be handy!!), whale losing its legs, snake losing its legs (hello, those spurs are to get their groove on, not their last 2 remaining toenails....and where's their hip!), etc,etc,etc). And if evolution improves things over time, why is it that the Trilobite, one of the earliest known animals, has an eye the is MORE COMPLEX than the human eye, even though they were around for "billions" of years before us? I may be wrong, but I have to agree with most of the others who have posted on this topic.......