Final answer:
The combining form meaning sex glands is 'gonado-' which refers to the gonads, specifically the testes in males and the ovaries in females, responsible for gamete production and hormone secretion.
Step-by-step explanation:
The combining form that refers specifically to the sex glands is gonado-. These glands are known as gonads, which in males are the testes, and in females are the ovaries. The primary functions of these glands are to produce the gametes—sperm in males and eggs in females—and to secrete sex hormones which regulate human reproduction. During sexual reproduction, these gametes combine to create genetically unique offspring.
This process is crucial in human development and the continuation of genetic diversity within the population.