Jazlyn Mooney (@Jazlyn_Mooney) #ASHG22: Want to trace the genealogical ancestors in African American individuals. 1870 census was the first collected to have more detailed information on African Americans in the US -- but still not a lot. Many do not know their roots.
Jazlyn Mooney (@Jazlyn_Mooney) #ASHG22 draws a distinction: genealogical and genetic ancestors are not the same.
Can use ancestry proportions from the present to estimate the number of ancestors from each source population in past. Implementing a mechanistic model of admixture
Can use ancestry proportions from the present to estimate the number of ancestors from each source population in past. Implementing a mechanistic model of admixture
Jazlyn Mooney (@Jazlyn_Mooney) #ASHG22: Model estimates the number of genealogical ancestors. Applying to African American ancestry individuals. Slave trade moved many individuals to the Americas. Shows time epochs on the model (slave trade, slavery, segregation era).
Jazlyn Mooney (@Jazlyn_Mooney) #ASHG22: For the various epochs, can estimate the fraction of non-European parents.
Majority of African ancestry occurs during the initial epoch (generations 1-2). More shift to African American parents in later generations.
Majority of African ancestry occurs during the initial epoch (generations 1-2). More shift to African American parents in later generations.
Jazlyn Mooney (@Jazlyn_Mooney) #ASHG22: By epoch 2 and 3, the majority of parents are African American.
But wants to know the number of geneaological ancestors. On average: 314 African and 51 European ancestors.
But wants to know the number of geneaological ancestors. On average: 314 African and 51 European ancestors.
• • •
Missing some Tweet in this thread? You can try to
force a refresh
