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Archiver > GENEALOGY-DNA > 2001-12 > 1008442947


From: "Allan S. Gleason" <>
Subject: Re: [DNA] MRCA calculator
Date: Sat, 15 Dec 2001 12:02:35 -0700
References: <a04310100b841206c9cda@[194.125.131.119]>


I found the paper mentioned below and was pleasantly surprised to find that the
paper just above it the listing referred to Haplogroup X of the Amerindians by
Brown, et al. To date I've had little interest in mtDNA, however, my two
granddaughters, fathered by my son have an Ojibwa mother whose mother lives in the
Canadian reservation by Lake of the Woods. I found it interesting that there was a
more recent connection of some group X to the Navajo's of the Southwest. My son
lives in Warroad, MN near the Canadian border. The town received the name Warroad
based upon the tradition of warfare between the Ojibwa and other Indians who among
other things were after the wild rice grown there in and about the marshes. Could
they have come from as far away and Arizona?

Allan
PS: Thanks Pat for the lead.



Patrick Guinness wrote:

> Dear Ann,
>
> That's a great calculator and paper, if I could understand it
> all. While the Y-mutation rate is 0.0012 per locus per generation,
> the probability of observing a mutation at any one of several loci is
> apparently higher.
>
> In Bianchi's paper on Amerindians (freely downloadable from
> the AJHG) at -
>
> http://www.journals.uchicago.edu/AJHG/journal/contents/v63n6.html
>
> at pages 1862 - 1871,
>
> he looked at 7 loci and applying a binomial distribution (page 1867,
> left column) he found that the probability of observing a mutation at
> any of the 7 loci is 0.0083.
>
> Obviously 0.0083 is a good bit higher than 0.0012 - that much
> I do understand.
>
> Could MathMan be prevailed upon to work out that formula for
> studies at 10, 12, 17 and 21 loci, for those of us who are
> algebraically-challenged or like me just plain innumerate?
>
> Looking at say one mutation / repeat either side of a
> middling result, to keep it simple.
>
> (I don't even know what a binomial distribution is either.)
>
> Further, I suggest that anyone interested in North- &
> South-Amerindian Y dna should download that paper.
>
> PG
>
> ==============================
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