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Archiver > GENEALOGY-DNA > 2010-03 > 1268418826


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Subject: Re: [DNA] Question about matches on Chromo #7 at 23andme RF
Date: Fri, 12 Mar 2010 13:33:46 -0500


> Wouldn't it make more sense to report them in a way that
differentiates between
> them - like Chr #1A and Chr #1B?
--------

Yes, it is too bad the technology only permits an alphabet soup to be
reported. Each SNP position is reported in alphabetical order. A
no-match occurs when both chromosomes from two individuals have a
no-match at a position.

This is a purely hypothetical example in the region you mentioned:

https://www.23andme.com/you/explorer/chr/?chr=7&pos_start=39471584
count 15 positions

1. CT AA TT CC CC CC AA GG AA CC CC TT GG CC CC
---------
2. CT AA TT CC CC CC AA AG AC CT CC TT GG CC CC
--------
3. CT AA TT CC CC CC AA AA CC TT CT TT GG CT CT

Person number 1 half-matches person number 2
Person number 2 half-matches person number 3
But Person number 1 does not half-match person 3

It helps to compare the raw data to understand the results.

Kathy J.




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