Archiver > GENEALOGY-DNA > 2010-03 > 1269813606

From: "Max Heffler" <>
Subject: Re: [DNA] 23andme cousin results
Date: Sun, 28 Mar 2010 17:04:47 -0500
References: <><><> <> <00d901cace95$a4b8bda0$5e82af48@Ken1> <><>
In-Reply-To: <>

Where are these percentages? My dad's sample matches mine at 48.43% DNA
Shared. Are you referring to the genome compare % similar? He and I are
83.93% similar there, implying my parents were genetic strangers according
to the formula below and both being Ashkenazi I would think they would be
closer than genetic strangers.

-----Original Message-----
[mailto:] On Behalf Of Vincent Vizachero
Sent: Sunday, March 28, 2010 12:42 PM
Subject: Re: [DNA] 23andme cousin results

Actually, the explanation for this is that two parents have genomes
that are something more than 0% identical to each other. In fact,
even complete strangers are about 65% to 75% identical for the SNPs
commonly tested.

So, if roughly 50% of my DNA comes from my father (that part must
match 100%) and 50% comes from my mother (and my mother is, say, a 70%
match to my dad given that they are genetic "strangers") then I will
match ((.5*100%)+(.5*70%))= 85% with my father.


On Mar 28, 2010, at 1:31 PM, John Carr wrote:

> Perhaps this male recombination bias David mentioned explains why
> parent to child shared results and sibling shared results are
> consistently around 84% rather than the 50% that is offered as the
> expected shared result.

To unsubscribe from the list, please send an email to
with the word 'unsubscribe' without the
quotes in the subject and the body of the message

This thread: