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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DragonFruit · 70-79, M

Despite having the same DNA source as our siblings, there will be variations in the composition of our DNA (unless we're identical twins).
My younger brother is bald, while I have a full head of hair.
He's about a foot taller than our youngest sister.
He's an extrovert and I'm an introvert.
Considering the many differences in actual genetic makeup among siblings, it might factor into whether a particular person is an introvert or an extrovert.

bijouxbroussard · F

@DragonFruit That makes sense, and it explains why when the four of us tested the combination of ethnicities were in different amounts, even though we all came from the same two parents. But I thought personality was different, more a matter of life experiences. My brother and middle sister are introverts, too.

DragonFruit · 70-79, M

@bijouxbroussard In my family, only one sister and my brother are extroverted...the other 6 are introverts.