section_path: Sex-determination systems/Environmental/Haplodiploidy
section_name: Haplodiploidy
paragraph_text: Haplodiploidy
  
  Certain insects, such as honey bees and ants, use a haplodiploid sex-determination system. Diploid bees and ants are generally female, and haploid individuals (which develop from unfertilized eggs) are male. This sex-determination system results in highly biased sex ratios, as the sex of offspring is determined by fertilization (arrhenotoky or pseudo-arrhenotoky resulting in males) rather than the assortment of chromosomes during meiosis.