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| Siemowit |
 Posted: Fri Jan 18, 2008 3:05 pm Post subject: Evolution |
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It is said that White race evolved from Black race.
So how long would it take for a Black population to evolve into White population if that Black population would live in Europe (without racial mixing) ? |
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| Guest |
| Posted: Fri Jan 18, 2008 3:12 pm Post subject: |
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I believe that the mass exodus from Africa was around 70K years ago, so something less than that I'd imagine.
Last edited by Guest on Fri Jan 18, 2008 3:27 pm; edited 2 times in total |
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| Siemowit |
| Posted: Fri Jan 18, 2008 3:15 pm Post subject: |
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| yes, but how long could it take ? such evolution |
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| Robbie |
| Posted: Fri Jan 18, 2008 3:24 pm Post subject: |
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If there's not mixing it will take thousands of years as there is only the small gene pool consisting only black genes in that respect. It would depend upon random mutations and even at that there would have to be some benefit of being "white" than black. Assuming their diets were ok for vitamin D, there would be no reason to need to turn whiter again so it simply would not happen.
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| Guest |
| Posted: Fri Jan 18, 2008 3:30 pm Post subject: |
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| Robbie wrote: |
| If there's not mixing it will take thousands of years as there is only the small gene pool consisting only black genes in that respect. It would depend upon random mutations and even at that there would have to be some benefit of being "white" than black. Assuming their diets were ok for vitamin D, there would be no reason to need to turn whiter again so it simply would not happen. |
I am not so sure about this, I believe the exodus split up into several groups almost immediately it left Africa which would mean the same 'chance mutation' occured in several places? |
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| jacketate |
| Posted: Fri Jan 18, 2008 4:49 pm Post subject: |
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Perhaps if the chance mutation was found to be beneficial in all areas that they emmigrated.
But i agree that the probability of this happening is very low.
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| Robbie |
| Posted: Fri Jan 18, 2008 5:24 pm Post subject: |
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| Megabrain wrote: |
| Robbie wrote: |
| If there's not mixing it will take thousands of years as there is only the small gene pool consisting only black genes in that respect. It would depend upon random mutations and even at that there would have to be some benefit of being "white" than black. Assuming their diets were ok for vitamin D, there would be no reason to need to turn whiter again so it simply would not happen. |
I am not so sure about this, I believe the exodus split up into several groups almost immediately it left Africa which would mean the same 'chance mutation' occured in several places? |
Yeah but it would be of benefit to lose the pigment as their skin could then make vitamin D which they may not get enough of in their diet. In todays condition thre is no such problem. And similarly one is more likely to contract skin cancer if they have pale skin in Africa.
If there is no selection there is no motive for change.
The migration happened a few times alright and then there were groups which they think returned to Africa and met although fossils only say so much on this.
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| elhermoso |
| Posted: Fri Jan 18, 2008 5:25 pm Post subject: |
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| Does the mutation have to be beneficial? Surely it just has to be adequate for survival, and i don't think that the colour of a persons skin effects that persons ability to survive in any way, except possibly camouflage in rather extreme instances back in early human's timeline. |
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| Robbie |
| Posted: Fri Jan 18, 2008 5:44 pm Post subject: |
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It obviously does since caucasians and black people and everyone in between come from distinct places relating to the temperature/sun exposure.
The more tanned you are the greater your defence against skin cancer but the less vitamin D your skin can and vice-versa for pale skin.
Mutations dont need to be beneficial but must not be harmful. If you are talking about an entire race turning one skin colour then there must be a benefit (here) to be paler than darker which I am arguing there is not. Otherwise you my just have diverity of colour as opposed to one winning out as preferable.
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| Siemowit |
| Posted: Sat Jan 19, 2008 5:17 am Post subject: |
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Let's look at some negroidal characteristics
The hair is black, crispy, and "woolly" in texture - there is no need to change such hair in European environment. Maybe straight hair gives better protection from cold, but today everybody can wear hat or cap. Even bold people are well protected from cold.
The nose is thick, broad and flat - broad nose does not give protection from cold (it simply takes to much air) so it could become less broad, but I'm not sure it would become less flat
The arms and legs of the Negro are relatively longer than the
European - no need to change it
The eyes are prominent, iris black and the orbits large - no need to change
The Negro has a shorter trunk the cross-section of the chest is more
circular than whites. The pelvis is narrower and longer - no need to change
The mouth is wide with very thick, large and protruding lips. - broad mouth gives less protection from cold, but we can't say lips would become less thick
The Negro has a larger and shorter neck - no need to change
The ears are roundish, rather small, standing somewhat high and
detached - no need to change
The jaw is larger and stronger and protrudes outward which, along with
lower retreating forehead, gives a facial angle of 68 to 70 degrees as
opposed to a facial angle of 80 to 82 degrees for Europeans. - jaw wouldn't change, forehead also wouldn't
The hands and fingers are proportionally narrower and longer. The
wrist and ankles are shorter and more robust. - wouldn't change
The teeth are larger and are wider apart than in the white race - wouldn't change
The heel is broad and projecting, the foot long and broad but slightly
arched causing flat soles, the great toe is shorter than in the white. - no need to change
the typical Negro head is long (dolichocephalic) and decidedly prognathous, the width across the brow is usually less than across the cheek bone, giving the face a hexagonal rather than an oval form as among Europeans - no need to change the shape of skull
nasal spine is poorly developed of often absent.
the lips are usually turned outward - no need to change I suppose
So probably the evolution would make white skinned man, with long jaw with big teeth, average mouth, but thick lips and small ears. He would have dark, wooly hair and dark eyes, just like a Black man. He would have narrow pelvis and long limbs. Probably he would have flat feet (if it's true that Blacks have flat feet). It is also very possible that his nose would be still flat.
So we can't say that a Black man would evolve into a modern European. He would be someone different. |
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| Guest |
| Posted: Sat Jan 19, 2008 5:28 am Post subject: |
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And another quote from that very racist site is as follows:
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There is sufficient data available to establish beyond . . .that the brain weight
of the whites is larger . . . particularly larger than that of the Negroes |
I think I can see where this was heading...
Now, be very careful what you post next, If I take offence to it you will not get another warning.
If you are unhappy with my locking this thread you may appeal to another moderator. |
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