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6.1 Introduction to ibddrop

ibddrop estimates probabilities of gene ibd (such as kinship, inbreeding, or multi-gene identities) by Monte Carlo in the absence of data. Given the pedigree and a genetic map, ibddrop simulates meioses indicators and scores them to estimate the ibd probabilities.

Gene identity can be scored either for each locus separately, in which patterns of identity among up to ten haplotypes can be scored, or it can be scored jointly over a moving window of several loci. In this case we score a single gene identity event -- in these examples, identity between the two haplotypes of each of several specified individuals.



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