Effects of SCE and InterCE rates on rDNA locus size (R1 and R2 not present). (A) Mean rDNA locus size as a function of offset size and SCE rate (w1 = 50, w2 = 100, InterCE = 1 × 10−4, loop-deletion coefficient = 5 × 10−5) (see methods). (B) Distribution of locus sizes in the population at various SCE rates (offset = 1–8). All other parameters were as in A. (C) Mean locus size as a function of InterCE and SCE rates (w1 = 50, w2 = 100, offset = 1–16, loop-deletion coefficient = 5 × 10−5).