
Figure 1.
Double fluorescent in situ hybridization (FISH) to human (a), chimpanzee (b), pigmy chimpanzee (c), and gorilla (d) metaphase chromosomes, using the cosmids 2E9 (TTY2L2A) and 2F6 (TTY2L12A) as probes. Specific signal in all species is seen only on the Y chromosome. The centromeric and banded signals are due to DAPI staining, and would appear as blue signal in a colored photograph.











