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 variation in size and shape; yet there is evidence that these cells are already committed to developing into the various segments of the larval and imaginal body (Wieschaus and Gehring 1976; Steiner 1976; see review by Sander 1976). In this book, the regularity with which major events of Drosophila embryogenesis occur has been repeatedly emphasized, and this regularity, which was recognized a long time ago, has suggested to investigators the possibility of establishing a fate map of the blastoderm.
KeywordsOptic Lobe Malpighian Tubule Germ Band Morphogenetic Movement Posterior Midgut
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