# Family and DNA

**URL:** <https://boards.straightdope.com/t/family-and-dna/945088>\
**Category:** Factual Questions\
**Created:** [June 26, 2021, 9:49pm UTC](https://boards.straightdope.com/t/family-and-dna/945088 "2021-06-26T21:49:22Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Darren\_Garrison](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/darren_garrison/32/92_2.png) [@Darren\_Garrison](https://boards.straightdope.com/u/Darren_Garrison)\
**Post date:** [June 26, 2021, 11:14pm UTC](https://boards.straightdope.com/t/family-and-dna/945088/4 "2021-06-26T23:14:32Z")

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Looks like I’m wrong about the average for full siblings as written above. I was thinking the halving twice instead of once. (But it still is a theoretical range of nearly 0% to 100%.)

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