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Archiver > GENEALOGY-DNA > 2011-01 > 1293904343


From: "Ken Nordtvedt" <>
Subject: Re: [DNA] How old is Y-Chromosome Adam?
Date: Sat, 1 Jan 2011 10:52:23 -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><004001cba9d5$b0498ed0$c2482dae@Ken1><C4D1EA69-E1DC-4EB2-8F2C-E97B0E9971F3@vizachero.com>


Just did it again with different collection of haplogroup I haplotypes (they
turn out to be all I1, not assorted haplogroup I

Interclade node age = 2782 generations with 1 sigma of 577 generations.


----- Original Message -----
From: "Vincent Vizachero" <>
To: <>
Sent: Saturday, January 01, 2011 10:38 AM
Subject: Re: [DNA] How old is Y-Chromosome Adam?


> What was your estimate in generations?
>
> Sent from my iPod
>
> On Jan 1, 2011, at 12:02 PM, "Ken Nordtvedt" <>
> wrote:
>
>> 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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