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Archiver > GENEALOGY-DNA > 2011-01 > 1293901352


From: "Ken Nordtvedt" <>
Subject: Re: [DNA] How old is Y-Chromosome Adam?
Date: Sat, 1 Jan 2011 10:02:32 -0700
References: <mailman.255.1293782436.1099.genealogy-dna@rootsweb.com><3203DE795D7E4D24B6A24928379E156E@anatoldesktop><AANLkTi=F+O4hFtK900wWetyKtfjzJB90r_CYi+5cc8h8@mail.gmail.com><3494E649-D554-4BFA-A206-80C054DBB9B6@vizachero.com><19954443.178870.1293883908917.JavaMail.www@wwinf2233>


I got 84,000 years with 1 sigma of 16,500 years using haplogroup A versus an
assortment of haplogroup I

But Generations5 was used which properly weights the STRs to take into
account that individual STR variances of variance goes as:

VarVar = 2mG ( 1 + 4mG)

which clobbers the weighting of the fast STRs.


----- Original Message -----
From: "Didier VERNADE" <>
To: <>
Sent: Saturday, January 01, 2011 5:11 AM
Subject: Re: [DNA] How old is Y-Chromosome Adam?


>I don't have Tim Janzen skill to calculate TMRCA with his method but those
>entries in this project seem clean enough and I wonder what results would
>be found with all these entries, instead of the nine ones. I bet the result
>is very different.
>
> Happy new year to all !
>
> Didier
>
>
>> Why, yes, there is. Thanks for asking.
>>
>> http://www.familytreedna.com/public/Haplogroup_A/default.aspx?iframe=ydna
>>
>> VV
>>
>>
>> On Dec 31, 2010, at 11:52 AM, Mike W wrote:
>>
>> > Is there a haplogroup "A" FTDNA project or has anyone
>> > looked for these haplogroups in the various FTDNA geographical and
>> > surname projects? I don't remember ever seeing one, but then I wasn't
>> > looking.
>>
>>
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