Transmission electron micrographs showing chromosomes in dividing spermatogonia during metaphase in tissue from ram testis (upper panel) and as they begin to separate during early anaphase in tissue from the Chinese hamster (lower panel).
Figures 124 (upper) and 125 (lower from Chapter 4 (Nucleus) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. A PDF copy of the accompanying chapter is available on the ASCB's BioEDUCATE website.
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