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From:
Subject: [DNA] Re: Two one-step mutations between 3rd cousins
Date: Thu, 1 Aug 2002 23:01:09 EDT


Dear Ann,

Thanks for the lesson in etiquette! Inserting a subject would be very
helpful, if I'd only thought of it.

The common ancestor was born in 1792. Four generations later, I collected
specimens from two of his g. g. grandsons. Here are the results in my
family, for these 3rd cousins with a very unusual surname:

385b 439
Cousin # 1 14 14
Cousin # 2 15 13

Notice that it is on the 12-marker test that they differ. The next 13
markers on the 25-marker test were identical.

I'll welcome any comments. I'm very surprised that they differed so much on
the 12-marker test. Isn't that the one that is supposed to be fairly
definitive in grouping close relatives? If I hadn't known these men, I'd
never put them together, based on the 12-marker test.

I'm going to get a sample from a cousin who descends from the brother of the
man born in 1792, and see what I come up with. Other than that, what do you
make of this?

Mary Fern




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