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http://morgan.rutgers.edu/morganwebframes/level1/page2/ChromNum.html

What are the minimum and maximum number of chromosomes?



How many chromosomes in....?

The record for minimum number of chromosomes belongs to a
subspecies of the ant Myrmecia pilosula, in which females have a
single pair of chromosomes.

The record for maximum number of chromosomes is found in found in
the fern family. Polyploidy is a common conduction in plants, but
seemingly taken to its limits in the Ophioglossum reticulatum. This
fern has roughly 630 pairs of chromosomes or 1260 chromosomes per
cell.

Each species has a certain number of chromosomes........

http://www.dnaftb.org/dnaftb/7/concept/index.html

step by step

http://biology.about.com/library/blmitosisani
m.htm

good DNA

http://www.cellsalive.com/

http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html

classifying cells by stage

http://www.pbs.org/wgbh/nova/cancer/grow_flash.html