Social and Behavioral Sciences Commons^™

The History Of Admixture In African Americans, Jessica M. Gross

Anthropology ETDs

African American admixture has been a focal topic of genetic studies since the mid-20^thcentury. Generally, these studies estimate individual- and population-level African and European ancestry proportions. Some of these studies fit unrealistic admixture models to the patterns of genetic diversity in African Americans to determine both the onset time of admixture between Africans and Europeans, and the per-generation contribution of Europeans.

This research has failed to consider the contribution of the millions of Africans who migrated, either forcibly or by choice, to North America during and after slave importation, and failed to consider how changing social dynamics have …

Estimating Ancestry And Genetic Diversity In Admixed Populations., Anthony Koehl

Anthropology ETDs

Admixture is a form of gene flow that occurs when long separated populations come into contact and exchange mates. Admixture has been a primary mechanism in the formation of many modern human populations. The genetic characteristics of an admixed population are intermediate to, yet distinct from, those of its ancestors. In this dissertation, I investigate biological and statistical factors that enter into the analysis of admixed populations using genetic marker data. In chapters one and two, I use genotype data from published sources that contain 618 microsatellite loci. In chapter three, I simulate genotypes of 500 microsatellite loci. In chapter …