G'day Liz,
As I reported in an earlier discussion on DNA testing, I lost my
status as a bearer of the Hertfordshire/Essex? Y chromosome several
generations ago when I became a descendant through a female
Catley. However the Catley name persisted so I am indeed descended
from the Hertfordshire/Essex lot.
Because I cannot contribute to the DNA study, I have not participated
in the current discussion. Furthermore I have only a fairly basic
knowledge of genetics and therefore I am unable to assist you in
deciding on the testing programme. However it is apparent that the
confidence limits of the conclusions that can be drawn from the test
will increase with the number of markers that are compared across the
range of Catleys that are screened.
As there is no urgency in rushing into the test, would it be prudent
to first discuss amongst those who are submitting to the test exactly
what they expect to find out e.g. the probabilities of belonging to
the same family in the event that various percentages of markers are
found to be common to all or some of the tested lines? This
information should be able to be provided in advance by the testing
laboratory as likely linkages should be expressed in terms of
probabilities rather then in absolute terms. If this is done before
committing to the test it might help to avoid disappointment after
the results are received.
Best of luck to you all.
At 07:08 AM 11/12/2006, liz cordingley wrote:
Hi All,
I spoke to John and he is willing to do the test. As they
automatically test for the highest range of markers and keep the
records on file for 25 years he would like to do a middle range test
first with a view to update later.
-
Regards,
Mick Catley
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