Contains seven chapters that review specific aspects of development in several different organisms, including sea urchins, flies, worms, frogs, and mice.

Following a review of amphibian metamorphosis, the author describes thyroid hormone receptors, the genes encoding them, and their target genes, as well as how their activities are coordinated by signaling molecules. Finally, in Chapter 7, Kaldis and colleagues discuss the functions of creatine kinase (CK) isozymes in spermatozoa from a variety of mammalian and nonmammalian species.

Contents. List of Contributors. Preface (P.M. Wassarman). RAS1-Mediated Photoreceptor Development in Drosophila (D.A. Wassarman and M. Therrien). Regulation of Germline Proliferation in Caenorhadbitis Elegans (B. Westlund, L. Wilson Berry, and T. Schedl). The Ecdysone Regulatory Cascades in Drosophila (G. Richards). The Patterning of Progenitor Tissues for the Cranial Region of the Mouse Embryo During Gastrulation and Early
Organogenesis (P.P.L. Tam, G.A. Quinlan and P.A. Trainor). Heart Development in Drosophila (R. Bodmer, K.L. Golden, W.K. Lockwood, K.A. Ocorr, M. Park, M. Su, and T.V. Venkatesh). Hormonal Signaling and Amphibian Metamorphosis (J.R. Tata). Functions of Creatine Kinase Isoenzymes in Spermatozoa (P. Kaldis, G. Kamp, T. Piendl, and T. Wallimann). Index.