INTRODUCTION Neuronal fate decisions must be coordinated across brain regions so that
the proper stoichiometry of distinct afferents and their target neurons is established. Many …

The R7 photoreceptor cells of the Drosophila retina are ultraviolet sensitive and are thought
to mediate color discrimination and polarized light detection. In addition, there is growing …

Stochastic mechanisms are sometimes utilized to diversify cell fates, especially in nervous
systems. In the Drosophila retina, stochastic expression of the PAS-bHLH transcription factor …

This review covers recent findings concerning the specification of the photoreceptor
subtypes in the Drosophila eye. Particular attention is paid to aspects of retinal patterning …

In the Drosophila optic lobes, 800 retinotopically organized columns in the medulla act as
functional units for processing visual information. The medulla contains over 80 types of …

Sensory systems sequentially extract increasingly complex features. ON and OFF pathways,
for example, encode increases or decreases of a stimulus from a common input. This …

A compact genome and a tiny brain make Drosophila the prime model to understand the
neural substrate of behavior. The neurogenetic efforts to reveal neural circuits underlying …

Specificity of sensory neurons requires restricted expression of one sensory receptor gene
and the exclusion of all others within a given cell. In the Drosophila retina, functional identity …

Butterflies rely extensively on colour vision to adapt to the natural world. Most species
express a broad range of colour-sensitive Rhodopsin proteins in three types of ommatidia …

Specifying synaptic partners and regulating synaptic numbers are at least partly activity-
dependent processes during visual map formation in all systems investigated to date [1–5] …