GENEALOGY-DNA-L ArchivesArchiver > GENEALOGY-DNA > 2008-10 > 1224065975
From: Nelda Percival <>
Subject: Re: [DNA] what is a clade?
Date: Wed, 15 Oct 2008 05:19:35 -0500
This is so interesting, I don't want to stop asking questions, and I know I should; so this is the last one.
Ok I went to http://ymap.ftdna.com/cgi-bin/gbrowse/hs_chrY/ I input M173 as you said and found M173 in the new window. I clicked on M173 in that chart bringing up the M173 data window. In the Datum was primer_f: and primer_r: each had a series of nucleotides, I am assuming that although each had a different sequence pattern they are assumed to be the same. That they are different only because of how they react to the primers.
Now you also said that:
SNPs are considered "biallelic", meaning they can assume only two possible values, A and C in the M173 example. If a G or T appeared at the M173 position (which seems unlikely), then it would no longer be called M173 and some new name would have to be invented.
Is only one of those A's changed to a C in derived or are all the A's in that pattern changed to C's? Next, are A's ever replaced with Ts or Gs? Of course the same type of question on changes for C or in reverse for the Ts and Gs....
This has been one interesting lession, wish I had the money to pay you for it, but something of this value is priceless...