National Health Museum
Access Excellence: Human Chromosomes
This map from Access Excellence shows human chromosome pairs. The site includes a short description of chromosome structure, staining of chromosomes and karyotypes.
University of Wisconsin
The Why Files: Scottish Sheep Shocker! New Pair of Genes
This article provides a discussion of DNA and how it replicates. Includes a chromosome map of a human male, a close-up of chromosomes just before cell division and a close up of a DNA molecule.