Thursday, December 18, 2014

Is it folly to use small segments in genealogical research?

I was reading this blog, The Folly of Using Small Segments as Proof in Genealogical Research and I just want to provide a quick reply.
  • Each BRCA1 gene mutation can be traced to a single common ancestor. For the record, a BRCA1 is only 80 kb in length. Is this not genealogically relevant? I am not suggesting to use as low as as 80 kb but above 2 cM / 200 SNPs, but the point here is, even as small segment like 80 kb can be used for genetic genealogy.
  • Pseudo-segments or compound segments, does indicate a common ancestry and it can be very recent in endogamous societies. Those segments are neither random nor false positives.
  • Phasing eliminates all sibling relatives of both subjects's common ancestor. If parents are cousins, then their common ancestor's siblings's descendants will all fail phasing test. Hence, the blog is not applicable for any endogamous society. I had explained better in Why phasing DNA is bad for valid and close matches?
I have nothing against but calling the process of using smaller unphased segments for genetic genealogy purpose as folly is absurd. Just because a blogger decides a boundary for their pedigree as genealogically relevant and ignoring endogamous society does not mean it has to be the same boundary for everyone else.

Tuesday, December 16, 2014

FamilyTreeDNA's 4th Mystery Reward!

On top of reduced prices for holiday sale, FamilyTreeDNA is providing Mystery Rewards for existing customers every week. Below are the 4th Mystery Reward!

Below are the mystery rewards for 4th week for all the 11 kits belonging to my close relatives which I manage. The rewards will expire on 21st December.

Big Y
$100 off Big YR5AU6IN0
Y-DNA
$10 off Y37, Y67, or Y111 R5ZBQAGK
$10 off Y37, Y67, or Y111 R55UA5WG
$10 off Y37, Y67, or Y111 R570A8UH
Autosomal
$10 off Family Finder R5FSRHMU
$10 off Family Finder R5YWZPUY
$10 off Family Finder R5BUX88J
Mt-DNA
$25 off mtFull Sequence R579KEU1
$10 off mtFull Sequence R5RCN562
Any purchase
$10 off any purchase R5ATRBB8
$10 off any purchase R5E5R0G2

Thursday, December 11, 2014

Ethinic Makeup of Ancients: FTDNA's myOrigins

FamilyTreeDNA was gracious to unlock all Ancient DNA kits. Below are the their myOrigins (Admixture). If you do match any of these ancients in FTDNA and missed my invite, you are welcomed to join the Ancient DNA project.


 

 

 

 

 

Tuesday, December 9, 2014

FamilyTreeDNA's 3rd Mystery Reward!

On top of reduced prices for holiday sale, FamilyTreeDNA is providing Mystery Rewards for existing customers every week. Below are the 3rd Mystery Reward!

Below are the mystery rewards for 3rd week for all the 11 kits belonging to my close relatives which I manage and the rewards that came through email. The rewards will expire on 14th December.

Y-DNA
$10 off Y37, Y67, or Y111 R5YCE805
$10 off Y37, Y67, or Y111 R50J3WTP
$10 off Y37, Y67, or Y111 R5JZDSTD
Autosomal
$10 off Family Finder R52YRW8O
$10 off Family Finder R5YT7IV3
$5 off Family Finder R5JLV7PN
$5 off Family Finder R58Z6OVY
$5 off Family Finder R58Y2L4P
Mt-DNA
$10 off mtFull Sequence R52YXLT8
$10 off mtFull Sequence R5P4RSJC
$10 off mtFull Sequence R5ZTYHUT
Any purchase
$10 off any purchase R5ND1GJX
$5 off any purchase R5P0BNP1

Thursday, December 4, 2014

Population Relationship on X Chromosome

Using Autosomal Pedigree Creator, I used the X-DNA matching segments to see how a pedigree looks like and I got the below pedigree trees.