Final answer:
Testosterone is the hormone responsible for the development of male genitalia during development. It stimulates the anatomical differentiation of male sexual organs and also influences the development of secondary sexual characteristics.
Step-by-step explanation:
The hormone responsible for the development of male genitalia during development is testosterone.
Testosterone is a hormone produced by Leydig cells in the testes and is essential for the anatomical differentiation of male sexual organs. It also stimulates spermatogenesis and the development of other secondary sexual characteristics such as facial and pubic hair growth, deepening of the voice, and increased muscle mass.