<P> Gametes ( sperm and ova ) are haploid cells . The haploid gametes produced by most organisms combine to form a zygote with n pairs of chromosomes , i.e. 2n chromosomes in total . The chromosomes in each pair , one of which comes from the sperm and one from the egg , are said to be homologous . Cells and organisms with pairs of homologous chromosomes are called diploid . For example , most animals are diploid and produce haploid gametes . During meiosis , sex cell precursors have their number of chromosomes halved by randomly `` choosing '' one member of each pair of chromosomes , resulting in haploid gametes . Because homologous chromosomes usually differ genetically , gametes usually differ genetically from one another . </P>
where are haploid cells found in the human body
sperm ova