Allelic gene conversion tract lengths do not correlate with extent of end-processing. (A) Tract lengths were estimated as the percentage of long-tract products (Ura−) in wild-type (+), deletion mutants of mre11 or yku70 (Δ), or mre11-H125N (HN). Values are averages ±SD for 3–8 determinations. (B) Percent crossovers estimated as His− fractions among all products, or just Ura+ classes. (C) End-processing measured by dot-blot of native genomic DNA from wild-type, mre11Δ, and yku70Δ diploid cells isolated before and at indicated times after GALHO induction.