... P2X 7 Amacrine cells Mosaics Rat In most brain regions, the number and relative density of neurons of each type vary remarkably little among individuals of the same animal strain( Williams and Herrup, 1988 ). This tight regulation controls the size of the different brain regions and allows...

...Joseph B. Duffy; Douglas A. Harrison; Norbert Perrimon ABSTRACT We have developed a ‘directed mosaic’ system in Drosophila by using the GAL4 system to control the expression of the yeast recombinase, FLP, in a spatial and temporal fashion. By directing FLP expression, we show that it is possible...

... to understand the role of cell-cell interactions in the control of flower development. Antirrhinum majus floricaula chimeras mosaics © 1995 by Company of Biologists 1995 17 10 1994 ...

... of genetic mosaics. First, with gynandromorphs, we removed the wild-type gene long before the critical developmental events to produce large mutant clones. The genotype of cells in large clones was scored by means of an antibody to the Notch protein. Second, using mitotic recombination, we removed the gene...

...Susan Zusman; Ramila S. Patel-King; Charles Ffrench-Constant; Richard O. Hynes The common subunit of the PS antigens of Drosophila is homologous with vertebrate integrins and is encoded by the lethal(1)myospheroid gene. We have generated flies mosaic for wild-type and mutant alleles of lethal-(1...

... either reversal of inactivation, or the frequency with which the influence of the X chromosome extends to the albino locus. 11 04 1986 Copyright © 1986 by Company of Biologists 1986 X-inactivation mosaics pigmentation genetic activity Cattanach’s insertion albino mouse mutation...