What is the medical term meaning germ or sex cell?

The medical term for "germ or sex cell" is "gamete". Gametes are specialised reproductive cells that contain half the genetic material needed to form a new organism through fertilisation. They are haploid cells, meaning that they have only one set of chromosomes. Gametes are produced through a process called meiosis, in which the chromosomes in a cell are duplicated and then divided equally into four daughter cells. Two types of gametes exist: sperm and ova. Sperm are the male gametes, produced in the testes, while ova are the female gametes, produced in the ovaries.