In agreement with typical plots of PC1 versus PC2, black African populations demonstrated a clear separation as a consequence of their geographic distance from each other [ 14], with PC1 reflecting a north south split.
MtDNA variation in T. graeca is rather large compared with the related species T. hermanni, probably because no losses occurred due to Pleistocene Ice Age selection as a consequence of the geographic distribution of T. graeca compared with that of the European T. hermanni [ 8].
As a likely consequence of geographic and human history, little inter-population gene-flow might be expected, as reflected in the EAV-HP integration site network.
Much less attention is directed at understanding the landscape of deleterious variation, an insidious consequence of geographic isolation and the inefficiency of natural selection to eliminate harmful variants in small populations [3 5].
However, participants' concerns focused around having to travel relatively long distances to access NHS dental practices as a consequence of the large geographic area.
The work addresses the question whether accessions of Arabidopsis thaliana complete vernalization at different times relative to the height of winter, as a consequence of adaptation to geographic differences in winter temperatures and winter duration.
As a consequence of time in geographic isolation, high genetic differentiation exists in allozymes and mtDNA between morphologically similar populations that contact across previous geological barriers [ 21, 22, 24].
Considering the high-level of premating isolation of these allopatric mosquitoes, we can assume that the observed genetic divergences between the Mali and Kenya S forms are the direct consequence of geographic isolation.
The school district scale may still mask important geographic disparities, a consequence of the modifiable areal unit problem (MAUP).
Our analysis also shows that traditional healers are frequently consulted in the treatment of malaria, likely as a consequence of their role within local cultures, and of geographic and financial barriers to accessing treatment from health clinics.
