Next generation sequencing hit-count ratios between male and female genomes. (a) All scaffolds arranged by Criscione et al.  in linkage groups. For autosomes, the expected ratio would be 1; for Z-specific scaffolds, the expected ratio would be 2 . Scaffolds are in the order defined by Criscione et al. (b) Male/female hit-count ratios and qPCR ratios for the Criscione et al. linkage group 2 (sex chromosomes). (c) Profile of hit counts along the latest version of the sex chromosome  for DNA extracted from females. One bar corresponds to 0.5 Mb. Arrows indicate the two pseudoautosomal blocks within the region where recombination is repressed.