Interpreting YOur DNA Results

The ENTIRE ARTICLE is attached document and was provided by GSMD.

Compiled by
Naomi Mann, MD
Surgeon General GSMD
September 26, 2019

NOTE: There are many companies that do DNA testing and offer interpretation. Since GSMD has partnered with ftDNA, I will be following their rationale and giving mostly their online examples.

Once your have received your DNA results, you will want to interpret them which may be challenging as there are different DNA tests. If you are man you have 4 types of DNA: sex
chromosomes X and Y dna (yDNA) one from each parent, mitochondrial DNA (mtDNA) solely from the mother, and autosomal DNA (atDNA) from both parents. If you are a woman you have 4 types of DNA: sex chromosomes xDNA from mother and xDNA from father, mitochondrial DNA (mtDNA), again, solely from the mother, and autosomal DNA (atDNA) from both parents. There are typically 5 tests for men: yDNA testing (father) including yDNA-STR and yDNA SNP, mtDNA testing (mother) and autosomal DNA testing (both parents). There are typically 2 tests for women: mtDNA testing and atDNA testing. X chromosome testing is not typically done but is possible having a lower yield of information as to date.

For testing purposes GSMD, at this time, recommends: atDNA for both men and women, the 111 yDNA test for men and the full sequence mtDNA for men and women. For review, there is both nuclear dna (autosomal DNA and the sex chromosomes Y and X DNA) and cytoplasmic dna (mitochondrial dna).

When you get your results back, you will have to log in online, your account will show your profile and next to it are 3 basic categories:
1. My family Tree – most important, this is your paper trail for your known family of ancestors; you should download your family tree immediately as it helps to filter and provide more information
a. Family Finder (autosomal dna = atDNA)
i. Matches---shows the name of your match and which side (Maternal, Paternal or both) they are from
ii. Relationship Range (RR)
1. Shared segments are based on the amount of cM or centimorgans; the
higher the cM between matches, the closer those matches are longest
block segment is the longest segment of atDNA measured in a cM shared
by you and a genetic match-