Definition
Haploid refers to a cell or organism that has a single set of chromosomes. Think of it like having only one copy of each page in a book, instead of two. This contrasts with diploid cells, which have two sets. Haploid cells are typically found in gametes (sperm and egg cells), which are involved in sexual reproduction. When two haploid gametes fuse during fertilization, they form a diploid cell. This process ensures genetic diversity in offspring.