Uploaded May 2026 | Updated September 2026, 5 hours ago
Can DNA really stay unchanged for over 100 years?
In this video, Andy answers a viewer question about how long a DNA segment can pass through generations without recombining—and the answer might surprise you.
Using a real example, he explains:
- How entire DNA segments (and even whole chromosomes) can be passed down unchanged
- Why shorter chromosomes are more likely to avoid recombination
- Why this becomes much less likely when comparing cousins instead of direct lines
This question also touches on real-world applications, including how long shared DNA segments might persist in investigative genealogy cases.
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This example comes from one of our live DNA Q&A sessions, where we break down real questions from our community.
👉 Watch the full Q&A session here: youtube.com/live/1r-lv0ZlWqI?feature=share
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CONTINUE LEARNING
🧬 Want a deeper dive into how long DNA can remain unchanged?
👉 youtu.be/8Xk_Z7jPHQ4
🧠 Learn more about DNA inheritance and recombination:
👉 How DNA Inheritance Impacts Your DNA Results youtu.be/-f7VUPmgy2U
👉 Stop Ignoring Chromosome Browsers If You're A Serious Genealogist youtu.be/0rt5m4bD2tk
↪️ Grab your FREE genealogy research guides and templates at familyhistoryfanatics.com/resources
⚡ Want to grow your family tree faster? Join our membership program.
youtube.com/channel/UCmkKepHoafldMRZ4UNt0Akw/join
📗 Like to read? Check out these books
familyhistoryfanatics.com/books
----------------
✅ Let's connect:
✔️ Subscribe for more genealogy tips: tinyurl.com/FHFanaticsYouTube
✔️ Website: familyhistoryfanatics.com
✔️ Share Video Ideas: familyhistoryfanatics.com/contact
This video is part of a series of genealogy research tutorials designed to assist viewers in building their family tree or expanding their family history research. Subscribe to our channel if you share our passion for genealogy!
#Genetics #geneticgenealogy #FamilyHistoryFanatics
Can DNA really stay unchanged for over 100 years?
In this video, Andy answers a viewer question about how long a DNA segment can pass through generations without recombining—and the answer might surprise you.
Using a real example, he explains:
- How entire DNA segments (and even whole chromosomes) can be passed down unchanged
- Why shorter chromosomes are more likely to avoid recombination
- Why this becomes much less likely when comparing cousins instead of direct lines
This question also touches on real-world applications, including how long shared DNA segments might persist in investigative genealogy cases.
*********
This example comes from one of our live DNA Q&A sessions, where we break down real questions from our community.
👉 Watch the full Q&A session here: youtube.com/live/1r-lv0ZlWqI?feature=share
----------------
CONTINUE LEARNING
🧬 Want a deeper dive into how long DNA can remain unchanged?
👉 youtu.be/8Xk_Z7jPHQ4
🧠 Learn more about DNA inheritance and recombination:
👉 How DNA Inheritance Impacts Your DNA Results youtu.be/-f7VUPmgy2U
👉 Stop Ignoring Chromosome Browsers If You're A Serious Genealogist youtu.be/0rt5m4bD2tk
↪️ Grab your FREE genealogy research guides and templates at familyhistoryfanatics.com/resources
⚡ Want to grow your family tree faster? Join our membership program.
youtube.com/channel/UCmkKepHoafldMRZ4UNt0Akw/join
📗 Like to read? Check out these books
familyhistoryfanatics.com/books
----------------
✅ Let's connect:
✔️ Subscribe for more genealogy tips: tinyurl.com/FHFanaticsYouTube
✔️ Website: familyhistoryfanatics.com
✔️ Share Video Ideas: familyhistoryfanatics.com/contact
This video is part of a series of genealogy research tutorials designed to assist viewers in building their family tree or expanding their family history research. Subscribe to our channel if you share our passion for genealogy!
#Genetics #geneticgenealogy #FamilyHistoryFanatics
