Figure 7-30. Complete diplotene chromosome complement of a male mouse, showing chiasmata. Numerals indicate the total/terminal chiasmata. (From Crew and Koller, 1932).

Crew, F.A.E., and P.C. Koller. 1932. The sex incidence of chiasma frequency and genetical crossing-over in the mouse. J. Genet. 26: 359-383.