Broman KW, Murray JC, Sheffield VC, White RL, Weber JL (1998) Comprehensive human genetic maps: Individual and sex-specific variation in recombination. Am J Hum Genet 63:861-869

Figure 3. — Total no. of observed recombination events in the 22 autosomes in each male and female meiosis, plotted by family (A and B) and against the age of the parent at the birth of the corresponding child (C and D).