DNA-R1B1C7-L Archives

Archiver > DNA-R1B1C7 > 2008-11 > 1227895569


From: "Sandy Paterson" <>
Subject: Re: [R-M222] NPE Frequency
Date: Fri, 28 Nov 2008 18:06:09 -0000
References: <e0d2d2870810280721g1af361d4y8d7be2d00132e9e2@mail.gmail.com> <000001c93a77$4be7ee20$e3b7ca60$@com> <000001c93a82$de6c9fb0$9b45df10$@com><000001c93f3b$7b41f3f0$71c5dbd0$@com>
In-Reply-To: <000001c93f3b$7b41f3f0$71c5dbd0$@com>


Hi All

I found one estimate that the number of adopted people in the USA is
somewhere between 6m and 10m, so 3% of the population may be about right.

What I'm trying to estimate is that proportion of males who have a surname
different to that of their natural father. Apart from adoption, it can
happen when the family surname is passed down a female line. This happens in
a young pregnancy where the mother doesn't marry, and the child is given the
mother's maiden name as a surname.

Another way a child can end up with a surname other than that of his or her
natural father is a young pregnancy, where the mother marries someone other
than the natural father.

Then there are the kind of NPE's by which a child is fathered by someone
other than a married woman's husband.

There are probably other ways that I haven't thought of.

All in all, I'd say it wouldn't be far out to work on about 6% of male
children ending up with a surname other than that of his natural father.

The implications of this are quite startling. It means that going back say
50 generations, the chances of a male child having the Y-chromosones of his
paper-trail 47xg-grandfather is only about about (.94)^50 = .0453

This seems quite relevant to me in considering for instance the DNA of
purportedly Dalriadic descendants. In particular, the roughly 10% R1b1c7
found in Clan McDonald would seem to be about what one would expect if they
were originally R1b1c7.

Any thought, anyone?


Sandy








-----Original Message-----
From:
[mailto:] On Behalf Of Sandy Paterson
Sent: 05 November 2008 11:42
To:
Subject: [R-M222] NPE Frequency

Does anyone in the group have a view on NPE frequency?

For purposes of the exercise, the definition of NPE includes teenage
pregnancies where the mother either never marries, or marries someone other
than the natural father of the child).


Sandy Paterson

R1b1c7 Research and Links:

http://clanmaclochlainn.com/R1b1c7/
-------------------------------
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: