What is the term for a haploid cell?

A haploid cell is defined as a cell that contains only one complete set of chromosomes. In organisms that reproduce sexually, haploid cells are produced during meiosis and are crucial for reproduction, as they combine during fertilization to form a diploid zygote. The most common examples of haploid cells are gametes, which include sperm and egg cells in animals and pollen and ovules in plants.

The other terms provided do not accurately describe a haploid cell. Diploid cells contain two complete sets of chromosomes, one from each parent. A zygote is the result of the fusion of two gametes, making it diploid. A chromatid is one half of a duplicated chromosome and doesn't refer to the overall ploidy of the organism. Therefore, the term that correctly identifies a haploid cell is gamete.