Cumulative distributions of Ty3-gypsy and Ty1-copia long terminal repeat (LTR) elements in the sex-determining chromosome regions. (A) The cumulative increase of sequences occupied by Ty3-gypsy and Ty1-copia LTR elements in hermaphrodite-specific Y (HSY) chromosome region and its corresponding X region. (B) The cumulative numbers of Ty3-gypsy and Ty1-copia LTR elements in the HSY and the corresponding X region. The distance between two dots represents 250 kb. Colored bars at an X-axis denote regions with significantly low repeat contents in the HSY (red) or in the corresponding X region (blue).