Specifically required in males for proper segregation of autosomal bivalents at meiosis I. Expression is required in the male germ line prior to spermatocyte stage S4. May have a role as a bridging molecule maintaining adhesion to hold autosome bivalents together via heterochromatic connections. Male meiotic chromosomes. Expressed at a low level in a variety of tissues, highest expression is in testis. Expressed both maternally and zygotically throughout development. Drosophilid specific gene duplication generates rgr and tef. Teflon has a function unique to Drosophilids. Belongs to the Teflon family.