Go Back   Family Tree DNA Forums > Universal Lineage Testing (Autosomal DNA) > Family Finder Advanced Topics

Family Finder Advanced Topics Advanced discussion about Family Tree DNA's Family Finder Product.

Reply
 
Thread Tools Display Modes
  #1  
Old 8th October 2017, 01:22 AM
tempest tempest is offline
FTDNA Customer
 
Join Date: Jul 2017
Posts: 5
Smile Min Match for full Ist cousins?

We are trying to confirm the identity of my Grandfather on my maternal side. I am female and my father is dead. However I have been autosomal tested along with a male ist cousin whos mother is a sister to my dad. The test came back as matching with 420 Centimorgans with 51 the longest block.
Is this enough to indicate full ist cousins? Or is there a possibility that the respective ist cousins parents, had different fathers?
Any help would be much appreciated. We are also in the process of getting my brother tested for auto and y DNA but results are not in yet. We hope to get a direct male descendant of the "possible" grandfather as well but this is proving a bit elusive at this time.
Thanks in anticapation.
Reply With Quote
  #2  
Old 8th October 2017, 01:44 AM
ltd-jean-pull ltd-jean-pull is offline
FTDNA Customer
 
Join Date: Jun 2016
Posts: 498
400 or so shared centiMorgans is about half of what you'd expect for 1st cousins.
Reply With Quote
  #3  
Old 8th October 2017, 03:48 AM
prairielad prairielad is offline
FTDNA Customer
 
Join Date: Feb 2011
Location: Canada
Posts: 2,023
Amount suggest a possible half 1st Cousin
This amount suggests that your father and aunt where only half siblings.

According to Blaine Bettingers chart, first cousins share between 553 to 1225cM, on average 874cM
https://isogg.org/wiki/Autosomal_DNA..._version_3.jpg
Reply With Quote
  #4  
Old 8th October 2017, 04:31 AM
Biblioteque Biblioteque is offline
FTDNA Customer
 
Join Date: Feb 2013
Posts: 546
Blog Entries: 1
My husband and his known 1st cousin share 930 cMs.

My known 1st cousin, 1x Removed and I share 452 cMs.
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
Full mtDNA match (or only HVR1 & HVR2 match)? Wing_Genealogis mtDNA - Genealogy Basics 10 17th October 2016 11:03 AM
Half cousins closer than full cousins Juanita Family Finder Basics 3 3rd October 2015 09:42 PM
Significance of full match Elena Govor X-DNA Advanced 9 13th June 2015 09:07 AM
Same cousins but cousins don't match each other? Boudicca Family Finder Basics 12 5th January 2015 08:32 PM
How Full Sibs Match X DNA mkdexter X-DNA Basics 0 27th November 2013 12:27 AM


All times are GMT -5. The time now is 09:07 PM.


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 - 2018, Jelsoft Enterprises Ltd.