(3 of 4) Cell dividing: chromosomes are being pulled toward the cellular poles.
Electron micrograph of the DNA and the protein scaffold left over from one chromosome (insert) with all the histone stripped out.
Electron micrograph of the 10-nm fiber.
(1 of 4) Photomicrograph of a cell dividing: nucleus is visible as dark staining organelle.
Electron micrograph of the 30-nm fiber.
Scanning electron micrograph of the head a normal Drosophila.
(4 of 4) Cell dividing: mother cell divides resulting in two daughter cells each with its own nucleus.
An electron micrograph of a mouse liver cell. Magnification approximately 12,000 times.
Scanning electron micrograph of the head a Drosophila mutant for the antennapedia gene.
This was one of the original photos that Roberts and his group used for analyzing their results.