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From: "Diana Gale Matthiesen" <>
Subject: Re: [DNA] overlapping of family trees
Date: Fri, 1 Jun 2007 08:32:26 -0400
References: <003401c7a43a$6b811ab0$6401a8c0@HP><618311.31915.qm@web38811.mail.mud.yahoo.com>
In-Reply-To: <618311.31915.qm@web38811.mail.mud.yahoo.com>


Exactly, Beth.

I compiled this table to demonstrate the "explosion" of ancestors as we got back
in generations:

http://dgmweb.net/genealogy/Ancillary/OnE/NumberAncestors.shtml

and why there has to be extensive repetition.

Diana

> -----Original Message-----
> From: On Behalf Of Beth Long
> Sent: Friday, June 01, 2007 7:39 AM
> To:
> Subject: Re: [DNA] overlapping of family trees
>
> Hi Diana,
>
> Thanks for another very interesting article. Clearly, there
> must be a great deal of overlap, and not just among noble or
> royal families.
>
> As an example, one young man in my project (he's age 25), has
> a huge ancestor tree. However, in the tenth generation, one
> couple appears six times. In brief, of 128 seventh generation
> ancestors, only 42 are unique (i.e. appear only once in his
> ancestor chart).
>
> This is logical I suppose, as otherwise the sum of all our
> ancestors would exceed the human population if you go back far enough.
>
> Beth
>

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