Figure 1.
Modes of cell growth and polyploidy in mammals.
(A) Diagram depicting different mechanisms underlying the formation of polyploid cells ranging from fusion of post-mitotic diploid cells, endomitosis (nuclear but not cell division), and endoreduplication. (B) Nuclei of polyploid trophoblast giant cells show selected small regions of under-replication (based on results from Hannibal et al.).