Figure 5

A parsimonious scenario of 8 inversions and 6 substitutions (including 2 insertions and 1 deletion) sorting human X into Y chromosome, using the dataset given in [10]. The symbol ‘P’ represents the current pseudo-autosomal region in the beginning of X and Y. Each number represents a common marker, each symbol x _i represents a unique marker in X and each symbol y _i represents a unique marker in Y (the unique markers were also obtained from the data in [10]). The three pruning inversions suggested in [[10], Fig. 7] are underlined. The boundary of the pseudo-autosomal region, indicated with vertical dots, is shifted to the left after each pruning inversion.