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5 - Measuring evidence: who's your daddy?

from PART I - Genomes

Published online by Cambridge University Press:  05 June 2012

Christopher Lee
Affiliation:
University of California
Pavel Pevzner
Affiliation:
University of California, San Diego
Ron Shamir
Affiliation:
Tel-Aviv University
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Summary

Single nucleotide polymorphisms (SNPs) are widely used as a genetic “fingerprint” for forensic tests and other genetic screening. For example, they can be used to measure evidence for paternity. To understand how scientists measure the strength of such evidence, we introduce basic principles of statistical inference using Bayes' Law, and apply them to simple genetics examples and the more challenging case of paternity testing. But first, just to make it personal, Maury and I have a little revelation for you …

Welcome to the Maury Povich Show!

On camera, your mom just told you that your dad, Bob, isn't your real dad! And Maury has just introduced you to the two men who both claim to be your father: Rocco, an aging biker dude with lots of tatoos; and Jacques, a chef in whose restaurant your mom waitressed 18 years ago. But is either of them actually your father? Once again it's time to announce the results of a paternity test LIVE on the Maury Povich Show! But between your tears (“But what about Dad … er, my ex-Dad …”), your anger (“how could you do this to me …”), and your intellectual curiosity (“Does this mean I can get the 8 course tasting menu at Chez Jacques for free?”), the science-nerd part of your mind is wondering exactly how paternity tests work, and how Maury can really claim to have so many decimal places of confidence regarding the result.

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Publisher: Cambridge University Press
Print publication year: 2011

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