FIGURE 16. Schematic depicting the maternal to zygotic transition.

FIGURE 16

Schematic depicting the maternal to zygotic transition. The cleavages of early embryos lack gap phases, are rapid, generate increasingly smaller cells, and are under maternal control. Upon zygotic genome activation, the cell cycle lengthens as gap phases and asynchronous divisions are introduced. These mitotic divisions are under maternal and zygotic control in some animals. In the mouse and humans, the cell cycles are longer and zygotic contribution begins earlier compared with zebrafish and Xenopus. The genes known to be required for early cleavage or zygotic genome activation are listed according to the stage when their maternal function is required for each model organism.

From: Cleavage/Mitosis: Going Multicellular

Cover of Maternal Control of Development in Vertebrates
Maternal Control of Development in Vertebrates: My Mother Made Me Do It!
Marlow FL.
San Rafael (CA): Morgan & Claypool Life Sciences; 2010.
Copyright © 2010 by Morgan & Claypool Life Sciences.

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