Do Missing Wattles Mean a Rooster Is Missing Testicles?

Do missing wattles mean a rooster is missing testicles?
No. Wattles are secondary sexual characteristics influenced by testosterone. While testosterone is produced by the testes, the presence or absence of wattles does not indicate whether a rooster has testicles. Wattles can be affected by genetics, injury, frostbite, and thermoregulation.