Cellular composition of primary spermatocytes from adult testes of F1 males.

Age, male age (weeks); N, number of cells (a total from three males); Lep, Leptonema; Zyg, Zygonema; EP, Early pachynema; MP, Mid-Pachynema; LPD, Late Pachynema-Diplonema. Analyzed using antibodies against SYCP3, H1t, and γH2AX on chromosomal spreads (see Figure 2 for representative images). The control data on 9-week-old (B6×B6), (PWD×B6)F1, and (B6.PWD-Chr X.1(s) ×PWD)F1 have been published [10]. See Results for statistical evaluations.