What is ancestry?

• Iain Mathieson ,

  * E-mail: mathi@pennmedicine.upenn.edu (IM); a.scally@gen.cam.ac.uk (AS)

  Affiliation Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

  http://orcid.org/0000-0002-4256-3982

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• Aylwyn Scally

  * E-mail: mathi@pennmedicine.upenn.edu (IM); a.scally@gen.cam.ac.uk (AS)

  Affiliation Department of Genetics, University of Cambridge, Cambridge, United Kingdom

  http://orcid.org/0000-0002-0807-1167

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