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Subject: RE: [DNA] African Ancestry (was Cecelia's Mother's DNAPrint 2.0 Results - a big surprise)
Date: Tue, 2 Sep 2003 12:22:34 -0400 (EDT)
Hello Tony,
Thank you for your reply.
I am now more relieved that the changes were for scientific
reasons rather than social reasons.
Thirty markers versus approximately 70 - 72 is a big difference.
And that bit about varying the chromosomes is important too due
to the cell division process of "crossing over".
It would be nice, though, if DNAPrint can report the results
(including that all-important confidence interval) for all four
ancestry groups - even is one or more of the results is zero
with a very tight confidence interval. Also, if you could make
the results available in numerical form - that way, those of us
who know a little about statistics can do more things with
them numerically.
I have figured a way to graphically represent all four groups
on a two-dimensional piece of paper. Other people in this forum
have also figured or are figuring ways to do so. I suggest that
DNAPrint consider adopting one of them or else looking at them
and adapting one for yourselves.
Regards,
Cecelia
+ + +
Hello All,
Even for people who do not trust the DNAPrint in its current
version for testing minority ancestry - it is still worthwhile
to ask older relatives to be tested. This is because you will
obtain the data - that can at some future point in time, be
run through some future, improved algorithm. To enhance this
benefit, either ask DNAPrint to store the DNA or order it via
FTDNA, who will store it for you. This way, if in the future,
DNPrint or some other company (like, maybe 50 years from now)
adds markers that are not tested for today, the DNA itself
will still be available.
(If somebody wants
a more technical definition of "crossing over" I'll supply it.
Here, I'll say that if two genes are "too close" to one another
on a single chromosome, they tend to be inherited together. Yes,
this violates Mendel's Law of Independent Assortment, but Mendel
did not have today's molecular biology reseach techniques and
he did not work with hundreds of traits when he did his experiments
with the monestary's garden peas.)
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