Fig. 3. Apoptosis in the Mili^+/- and Mili^-/- testes. TUNEL-labeled testes during the first wave of spermatogenesis (A-H) and in adulthood (I,J). Testes from heterozygous (A,C,E,G,I) and homozygous mutant (B,D,F,H,J) littermates were stained using the TUNEL technique. Testis sections are shown from 7-day-old (A,B), 9-day-old (C,D), 11-day-old (E,F), 14-day-old (G,H) and adult (I,J) mice. The nuclei were counterstained with Methyl Green.