F. Rudolf Turner

TL;DR: The protective coverings of the egg and surface changes in the embryo prior to gastrulation have been studied with the SEM and four specializations of the chorion are described: the plastron, micropylar cone, operculum, and the posterior thickening.

TL;DR: Stereoblastic embryos from the Doushantuo Formation of China exhibit occasional asynchronous cell division, with diminishing blastomere volume as cleavage proceeded, implying that sophisticated mechanisms for differential cell division timing and embryonic cell lineage differentiation evolved before 551 million years ago.

TL;DR: The architecture of the microtubule cytoskeleton can be directed by a component β-tubulin, and the moth Heliothis virescens β2 homolog was expressed in Drosophila testes and imposed the 16-protofilament structure characteristic of that found in the moth on the corresponding subset of Drosophile microtubules.

TL;DR: The formation of both the anterior most and posterior most segments in higher dipteran embryos involves complex movements of primordia which can be best visualized with the scanning electron microscope.

TL;DR: Analysis of retinal development in Delta (Dl) temperature-sensitive mutants reveals requirements for Delta function in the specification of all retinal cells, including photoreceptors, cone cells, pigment cells and cells that make up interommatidial bristles.