Siblings Don’t Have the Same DNA Matches! The Surprising Science Behind Your Family Tree

You and your sibling both took a DNA test… so why don’t you have the same matches? Shouldn’t your results look identical?

In this video, we’re cracking open one of the most confusing (and fascinating) parts of genetic genealogy: why full siblings share only about 50% of their DNA—and what that means for your DNA match list. You’ll learn:

Why your DNA matches can look completely different from your sibling’s

How genetic inheritance actually works (and what it doesn’t mean)

Tips for using sibling DNA tests to expand your family tree research

Before you assume your sibling’s DNA results will confirm your family tree, watch this. You might be overlooking vital clues hiding in your shared—and unshared—DNA.

👇 Got sibling testing questions or weird match results? Drop them in the comments and let’s solve them together!

↪️ Grab your FREE genealogy research guides and templates at https://www.familyhistoryfanatics.com/resources

0:00 Introduction
0:16 Why do siblings not share the same DNA with a match
1:15 Understanding the Shared cM Tool
2:26 Understanding the DNA Painter Histogram
3:35 Why do siblings share more DNA with a match than a cousin
4:05 Benefits of testing all siblings

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