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From: "RICHARD KENYON" <>
Subject: [DNA] Some 23andMe Stats
Date: Thu, 9 Oct 2008 02:01:17 -0700


I would like to retract some of my negative thoughts, particularly about what appeared to be random carriage returns in the raw data I downloaded and attempted to import into an MS Word document. The errors seem to be caused by Word choking with a huge 13,000 page document. I have since imported the same TXT file into an MS Access table and there is no sign of the earlier anomalies. I analyzed my results by counting for each chromosome the following: number of SNPs, no-calls, inserts, and deletes, as summarized in the following table (view using a monospaced type font).

Chr. SNPs No-calls II DD % NCs
======================================
1 44,060 168 5 2 0.381 %
2 46,521 177 3 1 0.380
3 38,599 135 3 2 0.350
4 34,320 132 0 1 0.385
5 34,911 126 0 0 0.361
--------------------------------------
6 38,142 188 7 5 0.493
7 31,184 112 1 3 0.359
8 31,802 139 3 2 0.437
9 27,121 89 1 0 0.328
10 30.059 110 3 1 0.366
--------------------------------------
11 28,070 99 3 1 0.353
12 28,140 98 3 0 0.348
13 21,458 76 1 0 0.354
14 18,801 71 2 1 0.378
15 17,114 60 1 0 0.350
--------------------------------------
16 17,320 63 1 4 0.364
17 15,304 65 9 0 0.425
18 17,012 62 1 0 0.364
19 10,209 46 3 0 0.450
20 14,465 64 0 0 0.442
--------------------------------------
21 8,408 39 0 1 0.464
22 8,771 32 11 3 0.365
Y 2,042 102 20 10 5.000
MT 2,042 10 1 0 0.490
======================================
Tot 579,751 2,361 82 37 0.407

I'm sure most of us are particularly interested in the Y-SNPs. It is a real shocker to see that no-calls are more than ten times as prevalent on the Y-chromosome as the overall average no-call rate. Let's hope that future designs will do a better job of reporting Y-SNPs.



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