Meiosis - a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores. Meiosis happens in cells used for sexual reproduction.
Haploid - describes a cell or nucleus having a single set of unpaired chromosomes. (Examples: sperm cells or egg cells)
Diploid - describes a cell or nucleus containing two complete sets of chromosomes, one from each parent. Most eukaryotic cells are diplod.
Germ cell - a name for the type of cell that is able to unite with one from the opposite sex to form a new individual.
Gamete - A mature haploid male or female germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote.
Zygote - a diploid cell resulting from the fusion of two haploidgametes; a fertilized egg.