The Indian muntjac and its chromosomes. Cells from a female Indian muntjac (right) contain three pairs of very large chromosomes (stained orange). The cell shown is a hybrid containing a pair of human chromosomes (stained green) for comparison.

[(Left) Hugh Lansdown/Shutterstock. (Right) J.–Y. Lee, M. Koi, E. J. Stanbridge, M. Oshimura, A. T. Kumamoto, and A. P. Feinberg. Nat. Genet. 7:30, 1994.]