GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2010-11 > 1290887435


From: Robert Stafford <>
Subject: Re: [DNA] CDY .... any upgrades?
Date: Sat, 27 Nov 2010 13:50:35 -0600
References: <5EF91C874983428BB6204F3523B3E948@ScottLaptop><AANLkTim_npttYB4Jv+HtP5rotmV66wNX9+t1T2f-oesc@mail.gmail.com><BA2CCB16858644FA923F43A2C5498247@ScottLaptop>
In-Reply-To: <BA2CCB16858644FA923F43A2C5498247@ScottLaptop>


I have seen this is a number of families. About all you can do is ignore it,
if the paper trail is otherwise good. It fact, CDY is so fast that you might
see a back mutation, even in a genealogical tiime frame.

Bob Stafford

On Sat, Nov 27, 2010 at 10:31 AM, Scott D Kendall
<>wrote:

> Bob,
>
> Thank you for responding.
>
> Yes, CDY is moving a lot within one group of the Cornwell study. I trying
> to determine if it was specific to one lineage, but it can't be isolated.
>
> One of the members in the group wanted to know if there were any tests to
> help isolate CDY.
>
> Scott
>
> -----Original Message-----
> From:
> [mailto:] On Behalf Of Robert Stafford
> Sent: Wednesday, November 24, 2010 11:34 PM
> To:
> Subject: Re: [DNA] CDY .... any upgrades?
>
> What issues do you have? CDY is an extremely fast marker. The two copies
> are
> about equal to the first 25 markers. Thus, they are likely to be involved
> in
> parallel mutations or even back mutations. Thus, they would not override a
> good paper trail.
>
> If you have a multi-step mutation where the markers double, it is likely a
> recLOH. Simply count it as 1. However, there are tests to consider in
> that
> case.
>
> Bob Stafford
>
> On Wed, Nov 24, 2010 at 10:01 PM, Scott D Kendall
> <>wrote:
>
> > Hello,
> >
> >
> >
> > Are there any additional tests that could help identifying or resolving
> > issues with CDYa & CDYb?
> >
> >
> >
> > Thanks
> >
> > Scott
> >
> >
> > -------------------------------
> > 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
> >
>
> -------------------------------
> 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
>
>
> -------------------------------
> 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: