Aneuploidy disrupts embryogenesis : Theodor Boveri's analysis of sea urchin dispermy Klaus Sander Essay Pages: 247 - 247
Neurulation in the anterior trunk region of the zebrafish Brachydanio rerio Beate SchmitzCyrus PapanJosé A. Campos-Ortega Original Articles Pages: 250 - 259
Molecular specification of cell lines in the embryo of Platynereis (Annelida) Adriaan W. C. DorresteijnBrian O'GradyYolande Boilly-Marer OriginalPaper Pages: 260 - 269
Competence of blastomeres for the expression of molecular tissue markers is acquired by diverse mechanisms in the embryo of Platynereis (Annelida) Adriaan W. C. DorresteijnChristiane Graffy OriginalPaper Pages: 270 - 275
Genes required for embryonic muscle development in Drosophila melanogaster A survey of the X chromosome Rachel DrysdaleEmma RushtonMichael Bate Original Articles Pages: 276 - 295
Quantitative analysis of mid-gestation mouse aggregation chimaeras: non-random composition of the placenta Roberta JamesJean H. FlockhartJohn D. West OriginalPaper Pages: 296 - 305
Effect of otu mutations on male fertility and spermatogenesis in Drosophila melanogaster M. TirronenT. I. HeinoCh. Roos Short Communication Pages: 306 - 311