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The University of PennsylvaniaSarah Tishkoff, professor in the departments of genetics and biology at University of Pennsylvania, is collecting samples in Africa. Collaboration by University of Pennsylvania and Cornell University PHILADELPHIA –- People who identify as African-American may be as little as 1 percent West African or as much as 99 percent, just one finding of a large-scale, genome-wide study of African and African-American ancestry released today. An international research team led by scientists from the University of Pennsylvania and Cornell University has collected and analyzed genotype data from 365 African-Americans, 203 people from 12 West African populations and...