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  • It concluded that the rate of “non-paternity” averages about 4 percent, though it differs along cultural and geographical borders.

    Who's Your Daddy?

  • The non-paternity rate for a representative sample of its father-son pairs is less than 2 percent.

    Who’s Your Daddy?

  • But other reputed non-paternity rates are higher than the canonical numbers.

    Who’s Your Daddy?

  • Many efforts to trace male ancestry using DNA terminate at what geneticists delicately call a “non-paternity event.”

    Who’s Your Daddy?

  • Given an average non-paternity rate of 5 percent, the chance of such an event occurring over 10 generations exceeds 40 percent.

    Who’s Your Daddy?

  • The problem would not loom so large if non-paternity were rare.

    Who’s Your Daddy?

  • Even with a low non-paternity rate, the odds increase with each successive generation.

    Who’s Your Daddy?

  • For example Joan Barry won a paternity suit against Charlie Chaplin in 1943 dispate the fact that a blood test proved non-paternity.

    The Volokh Conspiracy » Newsweek promotes Palin for President

  • Genetic counselors have been struggling with the issue of non-paternity for years.

    Who’s Your Daddy?

  • (Similar tests can reveal whether sons and daughters are really descended from their mothers and grandmothers, though non-maternity is much rarer than non-paternity.)

    Who’s Your Daddy?


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  • Where your mother is married to a man who thinks he is your father but who isn't; not to be confused with illegitimacy, where your mother isn't married to anyone.

    February 12, 2009