Y Chromosomal Adam and Mitochondrial Eve: Polygenism and probabilistic considerations

[brewer]

What is it we don't feed?

Raccoons?  Pigeons? The fish?

With NX's level of reasoning he/it could be any of those although reaching the level of racoon might be streaching it.

[Silver]

The truth of the matter, my ass.

[The Grand Nudger]

Mud man and rib woman. Peak bullshit.

[no one]

If this absolute dingleberry didn't copy and paste all this witless, half baked, mumbo jumbo, I'd bet my liver, both kidneys, my spleen, and both testicles that it could not spell 97% of the words it spews.

[HappySkeptic]

Perhaps you don't realize that for any particular gene, we have different common ancestors.

The Y-chromosome and Mitochondrial DNA are different, because they do not undergo mitosis, and we can find a statistical point of common ancestor for each.

However, the common ancestors for each of these can be different by a hundreds thousand years! And yes, there were people existing at the time, or where did these people (or the rest of our genetic makup) come from?

We share common genes with fungi, so the common ancestors for those genes existed hundreds of millions of years ago.

[The Valkyrie]

Is this really something you believe??

[Anomalocaris]

it will be interesting to see what he understand. The concept of “really believe” to actually mean.

[Paleophyte]

If I'm wrong, pls explain why with reasons.

OK. For a start it's hilarious that you icluded "probabilistic considerations" in the title given that mtDNA Eve and Y-chromosome Adam are entirely statistical effects. There were probably no fewer than 10,000 people alive at the times. Yes, times, plural. Their existence was separated by a few tens of thousands of years. Anything that you may have heard about population bottlenecks was written by pop-sci writers whose grasp of the science was almost as weak as yours. mtDNA Eve and Y-chromosome Adam are statistical artifacts of genetic drift and tools that allow you to follow only a single lineage.

Here's an easy way to visualize it. Draw a family tree of only your ancestors back to your great-great grandparents. There ought to be 16 people at the furthest generation. Now trace the exclusively matrilineal and patrilineal lines. This is what mtDNA and Y-chromosome analysis does. Clearly you're related to all 16 of your great-great grandparents but you can only trace your mother's mother's mother's mother using mtDNA and your father's father's father's father using the Y-chromosome. The techniques are simply blind to the rest of the population. You can only trace two out of sixteen of your ancestors.

Now simply repeat. For your matrilineal great-great grandmother trace her matrilineal great-great grandmother. And similarly for your patrilineal great great grandfather. And now you can only see 2 individuals out of 256 (give or take).

Repeat again and you're down to 2 out of 4096 ancestors. And all this winnowing has taken just 12 generations. A little math will show you that the soonest possible emergence of 2 distinct individuals from the whole of the human population will happen some time in the 12th to 10th century AD, depending on a couple of assumptions. That would be a wee bit inconvenient for all the Abrahamic religions, having Adam and Eve born centuries after their prophets lived and died. But, that's just a mathematical minimum. Nature is nowhere near that tidy with generations being an arbitrary construct that had vertical mingling and populations inbreeding (mostly at very large scales so it wasn't monster-begetting or disgusting, I'm talking 8th cousins and better here) and isolating from one another to slow the process up a lot more.

And thus you have a pair of tools that, when you look far enough into the past, reveals only two ancestors from whom we are all descended. Missing the billions of other from whom we are also all descended.

The fun part is that mtDNA Eve and Y-chromosome Adam aren't simply statistical artifacts, they're also artificial ones. Their identities are entirely dependant on the populations that you choose. Include the Neanderthals and Denisovans and you have to go a much, much longer way back into prehistory to find a completely different "Adam" and "Eve".

Misunderstanding science to prove mythology. What a farce.

[Bucky Ball]

Betty and Charles were Neanderthals.
LOL. Woops. DNA evidence says they diverged around 500,000 yeas ago.
He needs to learn about Genetics and how mtDNA really works.
https://en.wikipedia.org/wiki/Mitochondrial_DNA
https://en.wikipedia.org/wiki/Y-chromosomal_Aaron

There was no Adam, and no Eve.
All this means, (which you have misinterpreted) is that other lines died out. There were (obviously) many lines of humanoids.
Most of their mythology was taken (syncretically) from Sumerian / Babylonian literature. Exact references available on request.
You need to take "Comparative Mythology". No serious scholar of the OT or Ancient Near Eastern Mythology takes the Adam and Eve myth seriously as fact.
Wen you start to study the Bible texts, you should read "How the Bible Became a Book", and "who Wrote the Bible", Dr. William Schneidewind (UCLA) and Dr. Richard Friedmann.
The most pre-eminent archeologists in Israel today, see below, say there is almost no historical value in the OT, certainly not the Garden Myth.
The "disobedience" theme of the garden myth has been proven wrong by the famous Jewish philosopher Martin Buber who explains in Part II of "Good and Evil" how the Babylonian concept of "chaos vs order" is really whet is present in Genesis, (not a "disobedience" about an apple). References upon request.

https://www.youtube.com/watch?v=O5RfScpEcZ8&t=1286s

[LinuxGal]

1. Firstly, every human male alive today was found to have descended - derived his Y-Chromosome - from a Historical Figure in the past, whom researchers called Y-Chromosomal Adam. That means, at a minimum, that every other man beside Y-Chromosomal Adam, if they existed, must conveniently have had their descendants die out in the male line.

If Y-Chromosomal Adam lived before Jesus, and Jesus is male (having a Y chromosome), then Jesus, too, can trace his Y Chromosome to Y Chromosomal Adam.  Do you suppose he traces it through Joseph, or some else?