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Exemplar scoring of expected genotype scores. In each panel, the first sibling (individual II-1) is marked with an arrow. In panel A, only the first sibling is genotyped, and no flanking-marker data are available. In panel B, hypothetical flanking-marker data are available and can be used to characterize IBD sharing between the genotyped individual and her siblings. In panel C, two individuals are genotyped, providing further information.
