There is the story of the sperm bank that wanted to capture a well-known scientist's genes. The scientist said, "If you want my genes determining me to be a famous scientist, you would have to capture my parent's genes, my father being a poor immigrant from Europe and my mother, an ordinary housewife. My sons, however, all turned out to be guitar players."

I'm paraphrasing but you get the idea.

BTW, Charlie Parker and Louis Armstrong were all musical geniuses, like Mozart.
I wonder how well they would have done on IQ tests?

It is a known fact that Einstein was considered a moron in his younger days.

Could it be that intelligence like beauty is in the eye of the beholder?