BTW Lenski's experiment still continues... his current E. coli cultures have reproduced somewhere beyond 50,000 generations from their starting point... That said, the bacteria are all still E. coli and the notable 'change' that allowed his cultures to begin digesting citrate were fully manifest by the 31,500 generation (even if they progressively happened in steps)...
...Think about that for a second [we've done this exercise before]... A couple of genes in an asexual organism were altered after 31,500 generations...
If humans were able to "add" two (or being generous, three) beneficial genes to their genome at this rate, and if we conservatively considered a human generation to be all of 20 years (again generously) then under single lineage dynamics humans would be able to add three beneficial genes to their genome every ~600,000 years!!!
Ummm… that presents quite the conundrum for the accepted evolutionary timeframe of human lineage… especially when one considers there are over 40 million differences between our genome and the chimpanzee ‘next-of-kin’ genome… and if it’s generally accepted that our lineages broke apart only 6 million years ago…
[I know RG will tweak the math and make it all conveniently feasible…]
You mean tweak it like you tweaked it to make it conveniently *unfeasible*?
Let's dissect this here, as I think it is pretty symbolic of the kind and quality of arguments being made.
Facts stated:
1) "Two genes were altered in an asexual organism after 31,500 generations"
2) "there are over 40 million differences between our genome and the chimpanzee ‘next-of-kin’ genome…"
3) "it’s generally accepted that our lineages broke apart only 6 million years ago…"
Assumptions made to complete calculation:
1) Humans and bacteria mutate (add beneficial mutations) at the same generational rate, or 50% more (3 mutations as opposed to 2)
2) a human generation to be all of 20 years
Calculation:
20*31500= 630,000
humans would be able to add three beneficial genes to their genome every ~600,000 years!!!
I will grant, assumption #2, and fact #3.
The rest of it, will require some facts to be confirmed to fully see if this calculation has been "tweaked". I think the fatal assumption in this calculation is the first one, that an asexual bacteria will mutate as fast, generationally speaking, as a sexually reproducing (vive la difference!) human being. It is a very messy, flawed assumption, as far as I can tell.
Bull has been called. Back up fact 1 and 2, and show me on what you base assumption 1.
We will see who is tweaking what.