A biologist from TECFA @ IMD 13 nov 2001

Allopatric speciation as model of evolution in distributed teams

allopatric-speciation model for groups > spéciation > divers

A few notable phenomena :

Genetic drift

In very small (statistically speaking) populations, random changes influence flux of genes.

Fonder effect

In populations stemming from a limited number of individuals,the total number of different genes (alleles) is reduced and total diversity is limited to the combinations of the genes present in the Fondators.
(Geno / pheno)

Ex : Indians of america : no blood group B

Effects of differing environnements

Circumstances of evolution not same in two places.

Ex Islands, Galapagos


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12 nov 2001F. Lombard