Intrachromosomal and interchromosomal duplications
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Contingency table of chromosomal location of SD sequences (172 sequences) for the 86 unique duplication events (see text). For each duplication event (involving the two-copy repeats), after the identification of the location for one SD sequence, we identify the location of the other SD sequence. For instance, a duplication with one SD sequence on the chromosome arm X and the other SD sequence on the chromosome 2L is counted at line 1 (X) and column 2 (2L). The table shows the cumulated results for all 86 data points. The first diagonal [40, 22, 32, etc.] corresponds to intrachromosomal duplication, i.e., the two sequences are located on the same chromosome. Because we counted the sequence numbers on each chromosome, numbers in the diagonal have to be divided by 2 to obtain the number of intrachromosomal duplication events on each chromosome.
