Male meiotic chromosomes of Peloridium pomponorum subjected to standard staining (1, 4, 5) and FISH with a (TTAGG)n telomeric probe (2, 3). 1 MI, n = 16 (15AA + X) 2, 3 MI, n = 16 (15AA + X); hybridization signals (red) are located at the ends of chromosomes 4 AI, the sister chromatids (arrowed) of X chromosome are separated and oriented toward opposite spindle poles 5 part of a secondary spermatocyte cyst; X chromosome is present in every MII plate evidencing for the equational division during the first division. Bar = 10 µm.