Tests for paternity and genetic ancestry are the biggest sellers and those which claim to tell if you are more prone to certain diseases are also up.

For now, we are going into phase one of the scheme: a genealogical dinner, with each course tailored to match the genetic ancestry of one person around the table.

The authors conclude that caution should be used when using geographic or genetic ancestry to make inferences about individual phenotypes.

A similar scenario exists in trying to evaluate whether shared surnames indicate shared genetic ancestry.

Genetic ancestry of 105 captive tigers from fourteen countries and regions showed that forty-nine animals belonged distinctly to five subspecies; fifty-two animals had mixed subspecies origins.