A Fate Map of the Blastoderm
After a period of successive nuclear divisions the blastoderm is generated from the cleavage nuclei and the egg cytoplasm. The cells of the blastoderm do not show any apparent difference in size and shape; however, there is evidence that these cells are committed to develop into the various segments of the larval and imaginal body (Wieschaus and Gehring 1976, Steiner 1976; see reviews of Sander 1976, Lawrence 1981 a). Along the pages of this book the regularity with which major events of Drosophila embryogenesis occur has been repeatedly emphasized, and this regularity, which had been already recognized a long time ago, suggested to investigators the possibility of establishing a fate map of the blastoderm.
KeywordsMalpighian Tubule Germ Band Morphogenetic Movement Posterior Midgut Dorsal Ridge
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