mitochondrial DNA determines your haplogroup…If you’re like me, you’re always curious about your family history. You might have even taken a DNA test to find out more about your ancestry.

But what if I told you that your mitochondrial DNA (mtDNA) played a role in determining your haplogroup? Believe it or not, this is true! In fact, scientists have used mtDNA to trace human migration patterns all over the world.

So what does all of this mean for you? My story is coming up… keep reading to find out!

Your mitochondrial DNA determines your haplogroup.

Mothers pass down copies of their mitochondrial DNA (mtDNA) to their children in each generation. While most of your genome exists in 23 pairs of chromosomes that exchange pieces between generations in recombination, mtDNA is transmitted unshuffled. 

Because of this unusual inheritance pattern, mtDNA contains rich information about maternal lineages.

A small number of DNA changes, called mutations, generally occur from one generation to another. 

Because mtDNA does not recombine between generations, these mutations accumulate in patterns that uniquely mark individual lineages.

 Scientists can compare the sequence differences that result by constructing a tree. 

This tree shows how maternal lineages relate to one another, including the observation that they all share a most recent common ancestor, approximately 150,000 to 200,000 years ago.

The term “haplogroup” refers to a family of lineages with a common ancestor and, therefore, a particular set of mutations.

 We identify your haplogroup by determining which branches of the mtDNA tree correspond to your DNA.

 Because more closely related lineages tend to share geographic roots, your haplogroup can provide insight into the origins of some of your ancient maternal-line ancestors.

Maternal haplogroups are named with sequences of letters and numbers that reflect the tree’s structure and how the branches relate to one another.

Maternal Haplogroup

You descend from a long line of women that can be traced back to eastern Africa over 150,000 years ago. These are the women of your maternal line, and your maternal haplogroup sheds light on their story.

• Summary
• Scientific Details

Essie, your maternal haplogroup is L3b.

As our ancestors ventured out of eastern Africa, they branched off in diverse groups that crossed and recrossed the globe over tens of thousands of years.

 Some of their migrations can be traced through haplogroups, families of lineages that descend from a common ancestor.

 Your maternal haplogroup can reveal the path followed by the women of your maternal line.

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