Why do some people believe that all alive today descend from one woman?

[Anarchist420]

That's what I want to know.

Like I said, I really think the theory that everyone alive today descends from an African Mitochondrial Eve is a bit preposterous... I think that mtDNA group UK (and maybe D) descends from a neanderthal eve but the other 90-95% of humanity descends from the African mitochondrial eve.

But if you have some good arguments for macroevolution, I'd like to here them. Some would say all dogs macroevolved from wolves, but I really think that some dogs have no wolf (or very little) in them.

I really regret writing about the same topic so much, however.

 

[Sluggo]

You've thought about it about 100x the amount that I have.

 

[Dirigible]

I like pie.


Spider Man stole my pie.

 

[SKORPI0]

Interesting. :awe:

The Seven Daughters of Eve
http://chemistry.umeche.maine.edu/CHY431/Code4.htmlMitochondrial DNA
'Mitochondrial Eve': Mother of All Humans Lived 200,000 Years Ago

[SIZE=+2]Mitochondrial DNA is inherited ONLY in the maternal line; all of the mitochondrial DNA in any living human came from that individual's mother.

• Thus, it is not altered by sexual reproduction; that is, it does not undergo recombination.
• Changes come only from mutations during cell division.
• Mutations that occur in the control region tend not to be repaired, since that region does not code for any specific product
• Only mutations that occur in female germline cells (those that become eggs) are passed on to offspring

Bryan Sykes, at the Institute of Molecular Medicine in Oxford, has summarized the work of his group and several others:

• A method was developed by Sykes and others for extracting DNA from ancient bones, and amplifying it using PCR (polymerase chain reaction)
• By comparing numbers of mutations in the control region with time scales known from paleontology a clock is established: one mutation roughly every 10,000 years.
• Applying network analysis to the data from hundreds of individuals, Sykes found seven genetic clusters among people from all over Europe, the Middle East, and Asia.
  • The seven clusters had ages ranging from 10,000 to 45,000 years
  • This is the time for all the mutations observed to arise from a single founder sequence
  • That is, one woman is the ancestor of each of these clusters
  • We all are descended from one of those seven women

[/SIZE]

 

[gooseman]

How about you explain how they don't! It all had to start somewhere. In your opinion was the world all of a sudden populated with numerous men and women? If so, where did they come from?

 

[Printer Bandit]

our dna is from 12 different alien species.

humans are considered "royalty" by most aliens.

 

[Mr. Pedantic]

It's certainly possible. Though I don't know the evidence enough to say one way or the other.

our dna is from 12 different alien species.

humans are considered "royalty" by most aliens.

Why, because we're the bastard sons of whores that they didn't want?

 

[Printer Bandit]

It's certainly possible. Though I don't know the evidence enough to say one way or the other.



Why, because we're the bastard sons of whores that they didn't want?

actually it's 22 species
http://www.youtube.com/watch?v=4fIICJQnE9I&list=PLF2838071BFD6F264&index=2

 

[OverVolt]

You know nothing about biology. Mitochondria are passed down from the mother only. Each cell has around 5,000 mitochondria. Mitochondria have a small assortment of a very few genes, and mitochondria have a high mutation rate and extremely small genome. They are essentially stripped down symbiotic bacteria. Any organism under extreme competition tends to have a small genome and high mutation rate. They would have been gram negatives, in fact mitochondria have a double cell wall. It is possible to trace the mitochondrial DNA along the motherly lineage to say, Africa. But it doesn't have a whole lot of meaning. Due to the "founder effect" as humans moved out of Africa spontaneous mutations developed within some populations and not in others, such as lactose tolerance and blue eyes.

 

[OverVolt]

By comparing numbers of mutations in the control region with time scales known from paleontology a clock is established: one mutation roughly every 10,000 years.

This is kind of shady IMO. Mitochondria mutate quickly.

Our genes do show in the past that there was a bottleneck on our population. Down to maybe 12 reproducing humans. I just wouldn't really trust anything mitochondrial.

You couldn't test one person and determine which lineage they were from for example, because of the mutation rate in that area. But I'm sure they managed to find some type of pattern that confirms what we already knew. Science!

 

[OverVolt]

our dna is from 12 different alien species.

humans are considered "royalty" by most aliens.

Lol

 

[LevelSea]

The answer to all your questions, OP.
http://www.youtube.com/watch?v=1LzSX37C5J4

 

[Via]

Women like the kitchen.

 

[BarkingGhostar]

I like pie.

Who doesn't like pie?

 

[WelshBloke]

Who doesn't like pie?

I prefer cake myself, unless we're talking pork pies. Pork cake just isn't worth the effort.

 

[Gunslinger08]

I think that really either way you lean (evolutionary origin of man or divine creation as homo sapien), there has to have been a small group of homo sapiens that we can all be traced back to. Traditional evolution and natural selection don't really happen globally all at once. Either one or a few mutated homo sapiens were born and eventually dominated previous homo species, or a couple homo sapiens were divinely created.

In conclusion, we are all technically one big family.

 

[darkewaffle]

I don't just believe, I know.

 

[skimple]

Bah. We don't know as much as we think we know.

 

[Anarchist420]

Due to the "founder effect" as humans moved out of Africa spontaneous mutations developed within some populations and not in others, such as lactose tolerance and blue eyes.

What about testosterone loss?

 

[Sinsear]

 

[Markbnj]

This is kind of shady IMO. Mitochondria mutate quickly.

Our genes do show in the past that there was a bottleneck on our population. Down to maybe 12 reproducing humans. I just wouldn't really trust anything mitochondrial.

You couldn't test one person and determine which lineage they were from for example, because of the mutation rate in that area. But I'm sure they managed to find some type of pattern that confirms what we already knew. Science!

Mitochondria, midi-chlorians... is this a coincidence?

I recently read a good book by Ian Tatersall, "Masters of the Planet." His take on the bottleneck is a couple of thousand individuals remaining. Whatever the number it's pretty astounding, both in terms of what we can learn from genetics, and in the actual sense of our having come that close to extinction.

 

[Gibsons]

Some would say all dogs macroevolved from wolves, but I really think that some dogs have no wolf (or very little) in them.

Not sure if serious.

 

[IronWing]

It's a lot easier to believe than the two guys hypothesis.

 

[SlitheryDee]

That does seem unlikely. Wouldn't that "eve" have lived in a proto-human population of some sort with other females who were having children as well? Wouldn't her children mate with the children of those other females and also produce offspring? If so, why arbitrarily name this one individual the sole matron of humanity when the other females would seem to have contributed just as many genes as she did?

 

[WelshBloke]

Im disappointed in the lack of "Your Mom" jokes.