Is there a physical difference in a persons throat that makes them have a good singing voice?

Is there a visual difference in a persons throat that makes them a good singer? Why do some people have a great singing voice, while others don’t? Do long term vocal lessons have a physically changing effect on the throat muscles? Does a good inner ear play a bigger role in singing than the throat?

Or is singing a talent just like any other? Like being a good painter or dancer or writer? It’s not about the physical differences of the body, it’s all in the brain? Which, the brain is sort of a physical difference in all of us, but you know what I mean.

Apologies for the barrage of questions, but once I started writing out my question, a bunch of follow-ups came to mind.