Meiosis is a two-step cell division process that produces four haploid gamete cells from one initial diploid cell. In the first division, the diploid cell undergoes normal mitosis to produce two daughter cells. In the second division, the two daughter cells each split again to produce four haploid gamete cells such as sperm or egg cells. These gamete cells have half the number of chromosomes of the original cell and can fuse during fertilization to form a new diploid organism.