SNPs (single nucleotide polymorphisms) offer a definitive answer to a potential relationship.When one person is positive (derived) for a SNP and the other person is negative (ancestral) for the same SNP, they are not related in genealogical times.
The above is taken from an FAQ ID 1393 and I cut and pasted same to study but forgot to add the company that was the source.
Are we getting the cart before the horse by not taking an SNP test before you buy STR DNA tests?
If you do all that work with STR through all those panels and spend lots of time and money only to find out by a simple SNP that it was all a waste of time and money, then that cannot be a good thing.
In the McKee Group at FTDNA we have a cluster of 15 who are very close in STR but only one or two are advanced tested for SNP designation.I read somewhere that you could order a single SNP test to define M-222 from FTDNA for a reasonable amount for only one SNP.Most of the group are only tested at their original 37 markers with no advanced SNP tests.A few are only at 12 markers and not with the group due to having so few markers tested but are 12/12 on the "Niall" signature (along with thousands of other males).The members of the group are relatively uninvolved in the group and do not contribute towards research on an ongoing basis toward common ancestors.So, little progress is ever made in the important area of our MRCA in common with each group member.
Would the SNP to define M-222 be a good thing to attempt to convince each group member to test for?(Assuming this is possible on the one SNP.)Then, if not all are M-222 they would be entered into an existing or new group still for the McKee surname or variation but with the proper SNP designation.
I see this as an in-between area of a surname group and an SNP group and I am wondering what other groups are doing about this.