Figure 1. FISH mapping of ampliconic genes DAZ and CDY in eleven Y chromosome lineages of chimpanzee.

FISH signal patterns for DAZ (red) and CDY (green) is shown for each Y chromosome lineage included in the present investigation. The band locations of each gene are shown on the ideogram to the left of each FISH image. Yellow signals results from overlapping of red and green signals. Centromeres are marked by horizontal lines. Band nomenclature follows the ISCN [49]. The diagrammatic DAZ (red) and CDY (green) signal pattern for “Clint” is deduced from Hughes et al. [9] identifying a further Y variant in chimpanzee (see text).