title: Sevenless: a cell-specific homeotic mutation of the Drosophila eye.
abstract: Each ommatidium in the compound eye of the Drosophila mutant sevenless lacks photoreceptor number seven (R7) from the normal ommatidial complement of eight photoreceptors. A comparison of mutant and normal development reveals that this deficit is caused by the cell-specific transformation of the cell normally fated to produce R7 into a lens-secreting accessory cell, a cone cell.
authors.forename: A
authors.initials: A
authors.lastname: Tomlinson
authors.forename: D F
authors.initials: DF
authors.lastname: Ready