mixing and influence

[Salvador]

One question!

How are we to determine the amount of influence on native populations through time?

two examples:



situation 1:
Let's just say that every century (for 2000 years) 3 European caucasians settle (and intermix) in an African Village of 60 Black africans.
(ofcourse the same African village + the population always remains around sixty)

situation 2:

60 caucasian Europeans settle (at the same time) in an African village which has 60 black African inhabitants. But in the next 2000 years there has been no further mixing whatsoever.


Question: will the anthropological (genetic) influence of the white caucasians in the African villages be the same or is there a difference?

[jul]

Hi, idont know if it helps but i had once a very similar question, arcoding the answer i would get, it would be proberly like this:
Your settlers mix up with the abouriginals - every of your settlers will give a half set of cromosomes. His child what is mixed will gíve a piece of his genes to his/her child but its not said how much. Its possible he gave the full median set but *race* is not a single gene you know a lot of genes are involved and the nature do not select them as set but as mix. So may your settler has blue eyes and his child do have brown eyes but the *blue eyes gene* in his phenotype and this can stand in the genes over a few generations without ever come in usen til the next group of settlers- or another gg child of the white settlers what carry the blue gene too, have sex with him.
But its more possible that the guy/girl who is mixed up with new settlers get blue eyes.
Why? these blue eyes and may the lighter hair is a rezessive trait. and the chance get less and lesser(is that a word?)(more less) more far these rezessive gene lies in the past. I guess after the 4 generation is the chance 1/32 or so. But it happend.
If never appear any of your *whities* to the village it get lost by the time. May they will have some traits or some Halogroup or else what its left but it will be minimal.
If every few generation a white settle came around and the *mixed* are not seperated the guy who carry these genes have a change to *save it.
Warning: this is what is told to me by a professional. I dont know if i got it 100% right.