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From: "Malcolm Dodd" <>
Subject: [DNA] Measurement of fragment lengths
Date: Sun, 9 Nov 2003 12:53:01 -0000


Others with more technical expertise will be able to comment on a perceived
problem.
When two cousins have DNA STR markers which are measured at say
Male A 11.46
Male B 11.44
the group administrator would be unaware of this information as it would
probably be reported as
Male A 11.46 = 11.5 = 12
Male B 11.44 = 11.4 = 11
a one-step difference.
Non-experts such as myself tend to treat the results from the laboratories
as "gospel truth" but it is not necessarily that simple and we may well make
assumptions about the genetic distance and MRCA on a false assumption.
Malcolm


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