ron2
Posted : 8/28/2008 5:45:42 AM
espencer
People around here (not naming anybody in specific) have said that they like to elaborate their point of views based on scientific proof, well i show scientific proof and still manage to be against it, i guess it only depends on if you "feel like" accepting the scientific proof or not
There's no doubt that you are meaning me.
Secondly, you're correct on the science. The understood difference between human and chimp has increased, although your math is a bit off. If humans and chimps share 96 %, then the difference is 4% not 6 percent. See, 100 - 96 = 4. 100 - 6 = 94. See the difference? So, what kind of math is used for 100 - 96 to be equal to 6? Yeah, I googled the same pages you did.
Anyway, the upshot is that our understanding of canid genetics is expanding, too, and I expect that the gap between dogs and wolves will widen, too. That is, if we understood the difference between humans and chimps to be one amount but further investigation, and let's be honest, changing criteria as methods of differentiation improve, show the gap between humans and chimps to be wider than previously thought, imagine what will happen when applied to canids.
The difference you quote for dogs and wolves comes from the study of one locus of mtDNA done back in the 90's and published in 1995. Do you know if any other extensive work has been done since then? Well, the other bits of science I have read show that comparing species by mtDNA is inaccurate. That is mtDNA is similar in a number of different species. Kind of like saying two creatures are nearly the same species because they have 4 limbs. Also, the difference in that one locus of mtDNA between wolves and dogs is about the same from there to coyotes and another canids, as of the mid 90's. But scientists who specialize in the genetics and evolution of the canid group go by nDNA because it controls what the canid actually is. And the information from that is that the dog more closely resembles a coyote, in structure and behavior. That is also science.
Also, you should read the works of another scientist, L. David Mech. He studies wolves in their natural habitat. They don't scavenge as a rule, and certainly not nearly as much as a coyote or dog. They are most interested in bringing down large, live prey. It is coyotes who most often scavenge off a wolf kill.
espencer
Maybe because they are the same species
They are not the same species. As one genetic scientist pointed out, .2 percent difference is enough to separate two species, especially as the .2 percent are not necessarily confined to one locus of DNA but may be scattered throughout the entire genome. Did you know that two genes can act in combination to control a 3rd thing? For example, a gene for hair color and one for skin color together might also control eye color. Also, again, the nDNA difference between dogs and wolves had at least 26 different markers, which is enough to differentiate between species. Ain't science neat?
I think it's great that you are getting interested in science and I think you should read all the science.