Figure 1.

A likelihood surface of chromosome 21 data that is based on the fraction of short-range (0–5 kb) incompatible SNP pairs alone. ρ denotes the crossing-over rate, γ denotes the gene-conversion rate, and L(ρ,γ) is the product of the likelihood and an arbitrary constant. Note that estimates of gene conversion decrease rapidly with increasing crossing-over rates and eventually reach zero. A single pairwise summary cannot distinguish between the effects of gene conversion and those of crossing over.