Inferring the ancestry of parents and grandparents from genetic data
Fig 1
The perfect pedigree model for g = 3 for a single site.
H: extant haplotype. Pedigree is haplotype-based, which models ancestry changes along the genome. Ancestry origins of 8 founders are listed above the perfect pedigree. At one site, A and B indicate which of the two ancestral populations of each founder’s haplotype. The combined vector of these values is C. Here, C = (ABBAAABB). Arrows: the recombination vector R. Here, R = 0111101, where meiosis is ordered the in reverse time order and also from left to right. The population A shown in red: the ancestry of H as traced back by the recombination setting. Arrows can change direction at the next site. Founder ancestry is at a specific sites (say s1, s2, s3, …). Note that founder ancestry at the founders of the pedigree remains the same at different genomic position: these founders are the founding members of the admixed population and they are not admixed themselves.