Do you think introversion and extroversion are genetically based ?

I just received an update from ancestry.com indicating that my dna indicates I’m "probably an introvert" (in fact, I am). Curious, considering that my youngest sister, who comes from the same dna source is very much an extrovert and always has been. 🤔

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uncalled4 · 56-60, M

It makes sense. My ex-wife was adopted, but we found her biological family. They did not know each other at all for the first 25 years, but she looks like them, walks like them, etc., right down to the weird way she liked to hang pictures on walls slightly crooked...her biological mom did that, too. It was creepy.

To me, it's 80/20 nature vs. nurture...or even more so.