Genetic 'Adam' and 'Eve' Uncovered.....

[MMC]

Almost every man alive can trace his origins to one man who lived about 135,000 years ago, new research suggests. And that ancient man likely shared the planet with the mother of all women.

The findings, detailed today (Aug. 1) in the journal Science, come from the most complete analysis of the male sex chromosome, or the Y chromosome, to date. The results overturn earlier research, which suggested that men's most recent common ancestor lived just 50,000 to 60,000 years ago.

Despite their overlap in time, ancient "Adam" and ancient "Eve" probably didn't even live near each other, let alone mate. [The 10 Biggest Mysteries of the First Humans]

"Those two people didn't know each other," said Melissa Wilson Sayres, a geneticist at the University of California, Berkeley, who was not involved in the study.

Researchers believe that modern humans left Africa between 60,000 and 200,000 years ago, and that the mother of all women likely emerged from East Africa. But beyond that, the details get fuzzy.

In addition, mitochondrial DNA from the men, as well as similar samples from 24 women, revealed that all women on the planet trace back to a mitochondrial Eve, who lived in Africa between 99,000 and 148,000 years ago — almost the same time period during which the Y-chromosome Adam lived.

A separate study in the same issue of the journal Science found that men shared a common ancestor between 180,000 and 200,000 years ago.

And in a study detailed in March in the American Journal of Human Genetics, Hammer's group showed that several men in Africa have unique, divergent Y chromosomes that trace back to an even more ancient man who lived between 237,000 and 581,000 years ago. [Unraveling the Human Genome: 6 Molecular Milestones].....snip~

Genetic 'Adam' and 'Eve' Uncovered

Now what do you think about that? Man going back as far as 99,000 to 148,000 thousand years ago? Also with some in Africa going back over 550,000 years. :shock:

 

[Redress]

Interesting stuff. Thanks for sharing it.

 

[Fisher]

If I recall correctly from whatever class, all women have their mother's full DNA strand and half of their father's DNA, so there should be a traceable sequence in any female. That said, It would seem to me that the conditions that produced one Eve or her predecessor could have created multiple Eve-1' at the same time, so I leave room for that to not be the case. After all, we do have a star older than the universe now

 

[MMC]

If I recall correctly from whatever class, all women have their mother's full DNA strand and half of their father's DNA, so there should be a traceable sequence in any female. That said, It would seem to me that the conditions that produced one Eve or her predecessor could have created multiple Eve-1' at the same time, so I leave room for that to not be the case. After all, we do have a star older than the universe now

Heya Fisher :2wave:......yeah that's what they say here.

The Y chromosome is passed down identically from father to son, so mutations, or point changes, in the male sex chromosome can trace the male line back to the father of all humans. By contrast, DNA from the mitochondria, the energy powerhouse of the cell, is carried inside the egg, so only women pass it on to their children. The DNA hidden inside mitochondria, therefore, can reveal the maternal lineage to an ancient Eve.....snip~

 

[Fisher]

Heya Fisher :2wave:......yeah that's what they say here.

The Y chromosome is passed down identically from father to son, so mutations, or point changes, in the male sex chromosome can trace the male line back to the father of all humans. By contrast, DNA from the mitochondria, the energy powerhouse of the cell, is carried inside the egg, so only women pass it on to their children. The DNA hidden inside mitochondria, therefore, can reveal the maternal lineage to an ancient Eve.....snip~

Hello MMC. My concern here is that the sample size is very small. There have been studies concluding all blue-eyed people are descended from the same relative, but that was a pretty small sample size too. I am still inclined to believe that the conditions that created 1 likely created many more simultaneously because of the scale of nature and natural porcesses.

 

[MMC]

Interesting stuff. Thanks for sharing it.

.....

 

[Threegoofs]

Now what do you think about that? Man going back as far as 99,000 to 148,000 thousand years ago? Also with some in Africa going back over 550,000 years. :shock:

This is nothing about how far man goes back. Its only how far the last common ancestor was (and that LCA can change constantly, depending on who is alive at any time on the planet, not to mention changing estimates of mutation rates). Man - as the species homo sapiens, probably goes back about 200,000 years, possibly a bit more. I'm not sure whats going on with the divergent chromosome thing... realistically, you can trace back human DNA to single cell origins, since the genes for some of the basic biochemical pathways we share will all animals havent changed a whit in a half a billion years.