Yes. But even "all the knowledge we have" today about ME and YcAdam cannot be considered sound knowledge. Isn't the knowldge we have about ME and YcA pretty primitive?
We know absolutely nothing about "Adam" and "Eve". What we do know about are genetics. And everything we know about genetics says they did not live at the same time. If you have data that questions this finding, please present it. Until that time, there is no reason at all to question the outcome. Your preferred belief that they lived at the same time does not replace the data we do have that says they didn't.
No. At most we could share a ME who isn't human. In theory we could trace that ME right back to the dawnings of sexual reproduction but the odds against that are so high as to mean it's practically certain not to be the case.
I didn't avoid answering. I deliberately didn't answer the question. As I said, you changed the topic. My position deals with Adam of the Bible. You've eliminated that from your question, so I have nothing to add to this thread.
Is it (theoretically) possible to have two MEs even though we are all a single species?
I'm going to slightly disagree with Mr. Jack here and say that we could but not at the same time. The coalescence for Mitochondrial eve is around ~170,000 years based on the distribution of modern mitochondrial genotypes, if we were able to go in a time machine back a few 10's of thousands of years and do a similar experiment with that population of humans we might identify a different mitochondrial eve at a different coalescence point. Although as Mr. Jack points out, at some point that ancestor is not themselves going to be of the species Homo sapiens sapiens
By definition any given population can only have 1 mitochondrial eve at a time since the whole point is that ME is the common matrilineal ancestor, if there is more than one candidate genome then you haven't gone back far enough and aren't looking at the common ancestor.
The human race could even have a different mitochondrial eve in the future since novel mitochondrial genotypes are being produced all the time and in the right circumstances one of these could reach fixation.
There is a simulation on a site hosted by the North Carolina state university showing how a mixture of maternal mitochondrial genotypes resolve down to one as the result of random sampling.
It's worth noting that every little chunk of our genome has its own most recent common ancestor, not just mitochondrial DNA and the Y chromosome. Most of these ancestors lived much longer ago than ME or Y-Adam -- typically on the order of half a million or a million years ago.
quote:You are quick to jump into a 'reconciliation' story.
You are right, but not for the reasons you give. ME is not our oldest female common ancestor. She is instead our most recent common ancestor.
Assuming the Bible to be correct regarding the creation of Adam, we would not expect mitochondrial Eve to be the Biblical Adam's mate. ME might have been born any number of generations after Biblical Eve died.