Final answer:
Gametes, sperm, and meiosis are three terms that pertain to sexual reproduction but not asexual reproduction.
Step-by-step explanation:
Three terms relating to sexual reproduction but not asexual reproduction are gametes, sperm, and meiosis. Gametes are specialized reproductive cells, such as eggs and sperm, that fuse during fertilization to form a zygote. Sperm is a type of gamete produced by males, while eggs are produced by females. Meiosis is the process through which gametes are formed, involving two rounds of cell division that result in the halving of the chromosome number.