This image of a Drosophila female meiotic nucleus was made by Abby Dernburg. DNA was labeled with DAPI, and flourescence in situ hybridization (FISH) was done to detect sequences near the centromere of each chromosome:

 
For more pretty pictures of such nuclei, see A.F. Dernburg, J.W. Sedat, and R.S. Hawley (1996) Direct evidence of a role for heterochromatin in meiotic chromosome segregation. Cell 86: 135-146.