Go Back   Family Tree DNA Forums > Paternal Lineages (Y-DNA) > BIG Y and SNP Discovery

BIG Y and SNP Discovery This area is for talk about BIG Y results.

Reply
 
Thread Tools Display Modes
  #1  
Old 15th February 2017, 04:26 PM
Bertp Bertp is offline
FTDNA Customer
 
Join Date: Apr 2003
Location: Central Time Zone
Posts: 140
why more "Shared Novel Variants" than "Novel Variants"??

I recently received my Big Y results and am attempting to learn to understand them.

Can anyone tell me why I have 22 entries when I click on my "Novel Variants" tab but when i switch to matching, it reports my top match shares a larger number, 37, Novel variants with me?

more detail: When I click on the "37", in my match list for my top match's "Shared Novel Variants" entry, a popup titled "Shared Novel Variants with {Match Name}" lists 37 entries in the popup's "Shared" tab. On the popup's "{BertP's} SNPs" tab I have 1 entry with the text "These are the novel variants found in (BertP)'s Big Y results and not in {Top Match}'s results. On the popup's "{Top Match}'s SNPs" tab, I find 6 entries with the text "These are the novel variants found in {Top Match}'s Big Y results and not in (BertP)'s results."

Last edited by Bertp; 15th February 2017 at 04:35 PM. Reason: more detail
Reply With Quote
  #2  
Old 19th February 2017, 05:29 AM
GarethH GarethH is offline
FTDNA Customer
 
Join Date: Mar 2014
Location: Cardiff, Wales
Posts: 26
Quote:
Originally Posted by Bertp View Post
I recently received my Big Y results and am attempting to learn to understand them.

Can anyone tell me why I have 22 entries when I click on my "Novel Variants" tab but when i switch to matching, it reports my top match shares a larger number, 37, Novel variants with me?

more detail: When I click on the "37", in my match list for my top match's "Shared Novel Variants" entry, a popup titled "Shared Novel Variants with {Match Name}" lists 37 entries in the popup's "Shared" tab. On the popup's "{BertP's} SNPs" tab I have 1 entry with the text "These are the novel variants found in (BertP)'s Big Y results and not in {Top Match}'s results. On the popup's "{Top Match}'s SNPs" tab, I find 6 entries with the text "These are the novel variants found in {Top Match}'s Big Y results and not in (BertP)'s results."
There are 15-17 locations which are causing recurrent glitches in shared novel variant lists - they were named SNPs (so not novel) in the earliest test results but quality concerns caused FTDNA to declassify them. Failure to work through the consequences of this change means that some elements of the matching programs treat them as novel, others not. Exactly which ones appear in your shared lists depends on when you and your match got your results. You can easily spot them because the Reference and Genotype columns have the same letter - they should be disregarded.
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Comments please, on "half" and "true" siblings clintonslayton76 Family Finder Basics 2 25th October 2016 07:06 AM
Bug? Positions with reference values are listed as "Novel Variants" Sylvester BIG Y and SNP Discovery 2 7th August 2015 03:45 PM
Ad explanation to "My Matches" list below "Haplotree" East-Iberian Features Requests & Bug Reports Area 0 6th January 2010 11:57 PM
"DiMaggio" coming from the Albanian name "Dhima" jr76x DNA and Genealogy for Beginners 12 10th May 2008 09:27 PM


All times are GMT -5. The time now is 08:18 AM.


Family Tree DNA - World Headquarters

1445 North Loop West, Suite 820
Houston, Texas 77008, USA

Phone: (713) 868-1438 | Fax: (832) 201-7147
Copyright 2001-2010 Genealogy by Genetics, Ltd.
Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.