When it comes to singing. which is more important. genes, balls, or hardwork.?

Unfortunately for many, genes. You can work your rear end off and still not sound good.

Balls are good to have, but not as necessary as good genes.

Ask Tom Waits... BALLS!!!!!!!!!!!!

Genes - If you don't have the pipes, it doesn't matter the balls or the hardwork.

a good music vocal teacher

Balls and hardwork....
Genes have nothing to do with it
ask Bob Dylan
or the singer for AC/DC
90% of fantastic bands don't have a singer that was born a natural.

Sadly the audience look for sexuality, baring of physical assets, nifty dance moves, costumes,passion, lots of balls and anything that excites the eyes or testosterone. Quality of voice has gone out of the window.Of course you must have diligence to perfect your craft, and to perform often to maintain your popularity. The key is to remain slim, energetic, follow a sensible private life, be nice to fans, etc so as to last longer than 10 years in the profession. No point being a flash in the pan.

You've got to have guts. If you have a good singing voice and you work hard as you can, no one's gonna hear you if you don't sing out.

I would say genes. If you don't have a good foundation, then you can't build anything up. You have to at least have the potential.