DogmaHunter
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I'm not Jon, but I feel like answering.
See definition of "Homo Sapiens".
Measurements concerning the genetic variations in our collective genome.
http://www.tiem.utk.edu/~gross/bioed/bealsmodules/bottlenecks.html
I guess there are various ways to do this. I'm not a geneticist though, so I'll pass on a technical explanation.
I did read about it a couple years back.
An interesting phenomena concerning human genetics is how it relates to the out-of-africa history.
So, here's the scenario...
Humans evolve in a specific region in Africa. We'll call this the "mother population".
That's where ALL the genetic variation among humans is located at that point in time.
A group/tribe, (much) smaller then the mother population starts migrating and spreads out from there to europe and asia. This event marks a genetic bottleneck among the group that is migrating, since this group becomes genetically isolated from the mother population remaining in africa.
A part of this group settles in Asia and the other in Europe. Fast forward in time to the present day. Now, we have an interesting observation to make....
This observation is: there is less genetic variation between a random european and a random chinese person, then there is between an african and his unrelated neighbour.
Think about that for a second. It bears repeating:
There is LESS genetic variation between a random caucasian and a random asian, then there is between 2 africans, living in the neighbouring tribes or villages. Or even potentially in the same street.
Isn't genetics awesome? I sure think so.
On that note, I'ld love to participate in the genographic project.
https://genographic.nationalgeographic.com/
Kind of expensive though
EDIT: another interesting phenomena, is that languages around the world, seem to be following along the very same lines. We can look at languages and identify how many different "sounds" there are in a specific language. The differences between languages is what we could call "variation", in the genetic sense.
Now get this.... we see the exact same thing. There is a LOT more variation among african languages then in the rest of the world. Certain african tribes have upto 500 sounds and more. Many of which, are only found in Africa. Like those "click" sounds. Purely in terms of different sounds, Germanic and Roman languages are pretty much the same. Asian languages aren't that different either. The most variation, is -again- seen in Africa.
Exactly as we would expect, in light of an evolutionary history.
How do you define, 'human'?
See definition of "Homo Sapiens".
How did you arrive at these figures, 3,000-10,000?
Measurements concerning the genetic variations in our collective genome.
http://www.tiem.utk.edu/~gross/bioed/bealsmodules/bottlenecks.html
How can you trace genetics back in time? A theoretical genetic trace may not reflect the
historic genetic development.
I guess there are various ways to do this. I'm not a geneticist though, so I'll pass on a technical explanation.
I did read about it a couple years back.
An interesting phenomena concerning human genetics is how it relates to the out-of-africa history.
So, here's the scenario...
Humans evolve in a specific region in Africa. We'll call this the "mother population".
That's where ALL the genetic variation among humans is located at that point in time.
A group/tribe, (much) smaller then the mother population starts migrating and spreads out from there to europe and asia. This event marks a genetic bottleneck among the group that is migrating, since this group becomes genetically isolated from the mother population remaining in africa.
A part of this group settles in Asia and the other in Europe. Fast forward in time to the present day. Now, we have an interesting observation to make....
This observation is: there is less genetic variation between a random european and a random chinese person, then there is between an african and his unrelated neighbour.
Think about that for a second. It bears repeating:
There is LESS genetic variation between a random caucasian and a random asian, then there is between 2 africans, living in the neighbouring tribes or villages. Or even potentially in the same street.
Isn't genetics awesome? I sure think so.
On that note, I'ld love to participate in the genographic project.
https://genographic.nationalgeographic.com/
Kind of expensive though
EDIT: another interesting phenomena, is that languages around the world, seem to be following along the very same lines. We can look at languages and identify how many different "sounds" there are in a specific language. The differences between languages is what we could call "variation", in the genetic sense.
Now get this.... we see the exact same thing. There is a LOT more variation among african languages then in the rest of the world. Certain african tribes have upto 500 sounds and more. Many of which, are only found in Africa. Like those "click" sounds. Purely in terms of different sounds, Germanic and Roman languages are pretty much the same. Asian languages aren't that different either. The most variation, is -again- seen in Africa.
Exactly as we would expect, in light of an evolutionary history.
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