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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Starcrossed · 41-45, F

Probably some genetics or brain shape would influence personality, but I think nurture over nature contributes more to that personality attribute.