Table 2.

Summary of eye mutants isolated in the screen

Mutant	Lines	Map position*	Disc phenotype	Ref.
Gap1	7 (6)†	67D (III)	The cone cells are transformed into R7 neurons	20
gl	1	91A1-2 (III)	Differentiation into photoreceptor-type neurons is blocked at an early stage	21
marb	1	61C1-6 (III)	Nuclear migration in developing R-cells is impaired	22
fasII	1	4B1-5 (X)	Expression of atonal in the MF is reduced; abnormal development and cell  death are observed in eye discs mutant for this P-element allele	23

^*Cytological position and chromosome-linkage. 

^†Number of independent insertions.