FIGURE 3. Lengths of coding sequences of X-degenerate genes on chimpanzee and human Y chromosomes, and their human X-linked homologues.
From the following article:
Jennifer F. Hughes, Helen Skaletsky, Tatyana Pyntikova, Patrick J. Minx, Tina Graves, Steve Rozen, Richard K. Wilson & David C. Page
Nature 437, 100-103(1 September 2005)
doi:10.1038/nature04101
For each X–Y gene pair, three horizontal bars are shown, representing the predicted lengths (in kb) of the coding regions for the chimpanzee Y gene (black), its human Y-linked orthologue (light grey) and its human X-linked homologue (dark grey). Genes are listed in alphabetical order.