Identification of internal repeat sequences. The Y region (A), X sequence (B), and LG9 sequence (C) were each compared against themselves, and the results are shown as dot plots. (A) The Y-region contains a high number of repetitive elements, as indicated in boxes a and b, the former being specific to the Y-specific region. The Y-specific region is indicated by a two-headed arrow. The two homologous copies of Olaflnk in the Y-region are depicted as two parallel lines. (B) The X sequence also contains repeats, as well as two stretches of sequences present in the reverse direction. The repeats present in box c, upstream of OlaflnkX, are also present in the Y-region, and are plotted in box b in A. The two-headed arrows indicate the X-corresponding region. (C) The LG9 sequence contains no clustered repetitive sequence.
