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From: Vincent Vizachero <>
Subject: Re: [DNA] How old is Y-Chromosome Adam?
Date: Sat, 1 Jan 2011 12:38:48 -0500
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>
In-Reply-To: <004001cba9d5$b0498ed0$c2482dae@Ken1>


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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