|Progression of the morphogenetic furrow|
across the eye disc
diagram © 1999: Jessica Treisman, Skirball Institute
Photoreceptors further away from the morphogenetic furrow (on the right) are further along in their development. Other photoreceptors and accessory cells are recruited to each ommatidial cluster (composed of developing photoreceptors) by waves of expression of the ligand spitz (spi) for the EGF receptor.
back to Eye morphogenesis
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