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When parents and offspring, or siblings have similar sounding voices, is this down to heredity, or just from speech that's heard? Are vocal chords inherited too?

asked in Biology, speech, similarities

athenabs13ohe answers:

In my case, i sound nothing like the person who gave birth to me.
My sisters, 1 sounded like my adopted father,my other sister sounds like the maternal person.
My son and his father sound almost alike, and sometimes its hard when i ring my son to tell them apart. I sound like my real dad, i have been told that. So part of our speech /chords can be inherited.

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Messerwisser answers:

The voice is a combination of the shape of the vocal chords and the resonance apparatus that is inherited, and education.
But there is, as always with inherited properties, a large variation.

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