of the five Brazilian geopolitical regions. The SNPs assigned apart the parental populations from each other and thus can be applied for ancestry estimation in a three hybrid admixed population. Data was used to infer genetic ancestry in Brazilians with an admixture model. Pairwise estimates of F(st) among the five Brazilian geopolitical regions suggested little genetic differentiation only between the South and the remaining regions." Estimates of ancestry results are consistent with the heterogeneous genetic profile of Brazilian population, with a major contribution of European ancestry (0.771) followed by African (0.143) and Amerindian contributions (0.085). The described multiplexed SNP panels can be useful tool for bioanthropological studies but it can be mainly valuable to control for spurious results in genetic association studies in admixed populations." It is important to note that "the samples came from free of charge paternity test takers, thus as the researchers made it explicit: "the paternity tests were free of charge, the population samples involved people of variable socioeconomic strata, although likely to be leaning slightly towards the ‘'pardo'’ group". According to it the total European, African and Native American contributions to the Brazilian population are: An autosomal study from 2013, with nearly 1300 samples from all of the Brazilian regions, found a predominant degree of European ancestry combined with African and Native American contributions, in varying degrees. 'Following an increasing North to South gradient, European ancestry was the most prevalent in all urban populations (with values up to 74%). The populations in the North consisted of a significant proportion of Native American ancestry that was about two times higher than the African contribution. Conversely, in the Northeast, Center-West and Southeast, African ancestry was the second most prevalent. At an intrapopulation level, all urban populations were highly admixed, and most of the variation in ancestry proportions was observed between individuals within each population rather than among population'. According to another autosomal DNA study from 2009, the Brazilian population, in all regions of the country, was also found out to be predominantly European: "all the Brazilian samples (regions) lie more closely to the European group than to the African populations or to the Mestizos from Mexico". According to it European ancestry was the main component in all regions of Brazil: Northeast of Brazil (66.7% European 23.3% African 10.0% Amerindian) Northern Brazil (60.6% European 21.3% African 18.1% Amerindian) Central West (66,3% European 21.7% African 12.0% Amerindian) Southeast Brazil