Testosterone: The function of testosterone hormone is to control the development of male sex organs, produces male gametes (sperm) and control male features such as deeper voice, moustache, beard, and more body hair (than females).
Oestrogen: The function of estrogen hormone is to control the development of female sex organs, development of the female gamete and control female features such as feminine voice, soft skin and enlargement of mammary glands (breasts).