Haplotype block size distribution of published chromosome 21 data and simulations identified by FGT method. For the simulated data, each parameter combination is based on 1,000 replications. A, Distribution of haplotype block length in real data, simulated data assuming r=1.0*10-8, and simulated data assuming r=4.0*10-8. B, Distribution of haplotype block length in real data and simulated data assuming a mixture model of recombination (see text for details).