Predicting Recombinations for Half-Siblings. This is the average accuracy for predictions from a pedigree with two half-siblings and three parents. Five hundred simulation replicates were performed, and the average accuracy of estimates from the haplotype data is superior to those from genotype data. However, as the number of untyped founders increases, in both cases, the accuracy of estimates from haplotype data drop relative to the accuracy from genotype data. The accuracies of genotype and haplotype estimates appear to converge.