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How did the Human Genome Project improve genetic genealogy?

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Large illustrated genealogical tree with detailed branches and leaves, featuring family names and a central family crest, representing the Lippincott family lineage. — Genealogy Genealogical tree of the Richard and Abigail Lippincott family in America, constructed and published by Charles Lippincott, 1880.

The Human Genome Project (HGP) significantly advanced genetic genealogy by providing a foundational map of the human genome, which allowed researchers to identify and analyze genetic variations with unprecedented efficiency.12

Following the project's completion in 2003, it became possible to scan the genome for single nucleotide polymorphisms (SNPs) across diverse global populations. This capability forms the basis of biogeographical ancestry testing, which utilizes panels of ancestry-informative markers to infer an individual's geographical origins.2

In the context of anthropology, the HGP enabled molecular genealogists to trace the ancestral roots of families and individuals to specific continents or subcontinents. By mapping DNA sequence variations, researchers can now compare genomic information between individuals and populations to track human migration patterns and understand the evolutionary history of the species. These advancements transformed genealogy from a field traditionally reliant on oral traditions and written pedigrees into a rigorous science grounded in genetic analysis.342