Likelihood surfaces for dominant markers. Likelihood surfaces of ancestry (S) and interclass heterozygosity (H
) for 100 (A-C) and 300 (D-F) dominant markers for the same three hybrid genotypes as in Figure 5. Dominant allele frequences in the parental species were set to 0.9 for half of the markers and 0.1 for the other half in species 1 and vice versa for species 2. The F1 (A and D) had the dominant phenotype for all markers, the F2 (B and E) was homozygous recessive at of the markers, and the Fn (D and F) was homozygous recessive at of the markers. Each level of shading covers two units of log-likelihood, so black is within 2 log-likelihood units of the maximum.