Figure 18-30. Cleavage in a fertilized frog egg.

Figure 18-30Cleavage in a fertilized frog egg

In these scanning electron micrographs, the cleavage furrow is especially obvious and well defined, as the cell is unusually large. The furrowing of the cell membrane is caused by the activity of the contractile ring underneath it. (A) A low-magnification view of the cleaving egg surface. (B) The surface of a furrow at higher magnification. (From H.W. Beams and R.G. Kessel, Am. Sci. 64:279–290, 1976.)

From: Cytokinesis

Cover of Molecular Biology of the Cell
Molecular Biology of the Cell. 4th edition.
Alberts B, Johnson A, Lewis J, et al.
New York: Garland Science; 2002.
Copyright © 2002, Bruce Alberts, Alexander Johnson, Julian Lewis, Martin Raff, Keith Roberts, and Peter Walter; Copyright © 1983, 1989, 1994, Bruce Alberts, Dennis Bray, Julian Lewis, Martin Raff, Keith Roberts, and James D. Watson .

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