.... This Review considers how symmetries and asymmetries form alongside each other within the embryo, and how they are then maintained during growth. I describe how asymmetric signals are generated in the embryo. Using the limbs and somites as major examples, I then address mechanisms for protecting symmetrically...

... are arranged in diametrically opposed longitudinal files that maximize the distance between them and create a bilaterally symmetric (diarch) root. Mutations in the LONESOME HIGHWAY ( LHW ) gene eliminate bilateral symmetry and reduce the number of cells in the center of the root, resulting in roots with only...

...Jau-Nian Chen; Fredericus J. M. van Eeden; Kerri S. Warren; Alvin Chin; Christiane Nüsslein-Volhard; Pascal Haffter; Mark C. Fishman ABSTRACT The first evident break in left-right symmetry of the primitive zebrafish heart tube is the shift in pattern of BMP4 expression from radially symmetric...

...H. Frederik Nijhout ABSTRACT The wing patterns of butterflies are made up of an array of discrete pattern elements. Wing patterns evolve through changes in the size, shape and color of these pattern elements. The pattern elements are arranged in several parallel symmetry systems that develop...

... flower symmetry. Several plant species, exhibiting a range of inflorescence types and floral symmetries are being analysed in detail. Comparative genetic and molecular analysis shows that inflorescence architecture depends on two underlying parameters: a basic inflorescence branching pattern...

...Einhard Schierenberg Copyright © 1986 by Company of Biologists 1986 Caenorhabditis nematodes determination polarity prelocalization symmetry laser microbeam How the complex, multicellular structure of an organism is generated from the information contained...

... with the formation of the ommatidial bundles. 04 04 1985 Copyright © 1985 by Company of Biologists 1985 Drosophila pattern formation symmetry electron microscope compound eyes The insect compound eye, in which cells are arranged in a crystal-like lattice, has been the subject...