A haploid cell is a cell that contains a single set of chromosomes. In humans, haploid cells are produced during meiosis, a type of cell division that reduces the number of chromosomes in a parent diploid cell by half. The resulting haploid cells have only one set of chromosomes, while most cells in humans are diploid, meaning they have two copies of each chromosome. In humans, only the egg and sperm cells are haploid. The number of chromosomes in a single set is represented as n, which is also called the haploid number. In humans, n = 23. Gametes contain half the chromosomes contained in normal diploid cells of the body, which are also known as somatic cells.