All possible complexities of fragment rearrangements in an alignment have been observed. The figure shows a scatter plot of the number of fragment rearrangements vs the number of fragments in the alignment. Bar charts on the top and on the right of the picture reflect the occurrence of alignments with a particular number of fragments and number of rearrangements. Only alignments with more that one fragment rearrangement have been considered to calculate the bar proportion. The numbers on the bars help visualize the scale. The area in the right-upper corner is not populated because of a lack of statistics (see text).