There are five ancestral populations of H. pylori — two in Africa, two in Europe and one in East Asia.
It exploits the long‐range linkage disequilibrium generated by admixture between genetically distinct ancestral populations.
The TREM2 variant associated with higher CRP is common in Africa but rare in other ancestral populations.
A long-standing question is when the ancestral populations of Neandertals and modern humans diverged.
(This may contain clues to the spread of ancestral populations across Europe).
The reality of species diversification is that it most often proceeds by "cladogenesis," the branching of new species from common ancestral populations.
Using genetic data, it is possible to infer some information regarding the sizes of ancestral populations for domesticated animals and plants.
However, ancient molecular lineages may just represent limited heritages of undefined ancestral populations rather than real indications on the origin and migration history of present populations.
Its deep subpopulation structure offers further evidence that the annual growth habit may have evolved multiple times from different ancestral populations.
Within this framework, prejudices and related phenomena are viewed as products of adaptations designed by natural selection to manage fitness-relevant threats and opportunities faced by ancestral populations.
Compared to sedentary population, nomads showed signals of stronger genetic drift occurring in their ancestral populations.
