Monday, March 9, 2015

The 3 Types of DNA Tests for Ancestry & Genealogy VISUALIZED!


A lot of people know about genealogical DNA tests but have no idea there are three main tests to choose from that measure very different parts of your ancestry. So I edited two blog posts to add this screen-grab, which I altered with information to help explain the three different types of DNA tests available. What do you think? Does it makes things slightly easier to understand? If so, share this blog:
(Screen-grab from: Boxed text added by TL Dixon)
  • First, AUTOSOMAL-DNA* (atDNA) Test analyzes your 23 chromosomes to estimate your ethnic contributions inherited from your parents, 4 grandparents, 8 great-grandparents,16 gg-grandparents, 32 ggg-grandparents, etc., and includes an estimate of your ethnic admixture broken down into percentages, as well as match you to real genetic relatives going back about 500 to 1000 years. 
  • Second, MITOCHONDRIAL-DNA* (mtDNA) Test analyzes your cell’s mitochondria genetic code to determine your ancient maternal ancestry; you inherited your mtDNA exclusively from your mother and her direct fore-mothers going back tens of thousands of years to a common ancestral mother. Therefore the mtDNA test is used to determine your MATERNAL HAPLOGROUP ASSIGNMENT (an identifier for mutation(s) unique to your mtDNA organized on "Phylotree" according to an alphanumerical grouping system ie haplogroups B2 or L1b1a or U6a5b for example)
  • Third, the Y-CHROMOSOME DNA* (Y-DNA) Test, only available to males, analyzes his Y-chromosome to determine his ancient paternal lineage via his father and direct forefathers going back tens of thousands of years to a common ancestral father. Therefore the Y-DNA test is used to determine a male’s PATERNAL HAPLOGROUP ASSIGNMENT (identifiers for mutations unique to a male’s Y-chromosome organized on "Phylotree" according to an alphanumerical system ie haplogroups A0 or E-U290 or R1b1a2).


  1. Great to know!.. I have studied that many Genomics Sequencing Companies give dna & genome sequencing service, genotyping, health diagnostics, bioinformatics, custom cdna library development. I think, this is what we call as new generation. Thanks