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Family K pedigree. Note the common alleles of III.2, III.3, III.7, and IV.6 assumed to be from their common II.2 origin (black bar). The second allele of III.2 is dissimilar to those of III.3 and III.7 and is therefore assumed to be from their different mothers (blank bar). NT, not tested for APC mutation; d, died (age in years); arrow, propositus.
