For example, Asz1 KO males are sterile due to a block in spermatid development26, Tex12 KO males exhibit infertility associated with failure of crossover events during meiosis27, and Majin KO males show infertility because of the failure of meiotic telomere tethering31 (see Supplementary Table S1 online). This evidence concerns the gene TEX12 and Infertility.