Figure 4.

The likelihood surface of chromosome 21 data based on p(a) and p(b), for a mean tract length L=500 bp. Likelihoods were calculated from 8,000 simulations of 200-kb sequences for different rates of crossing over (ρ=0–160) and gene conversion (γ=0–300). L(ρ,γ) roduct of the likelihood and an arbitrary constant. The peak is seen at ρ=80 and γ=125.