Polytene chromosomes normal.
May have a P element insertion.
Mutation spans the head specific region and the proximal lethal region.
Homozygous viable.
Homozygous viable. Eye specific allele.
Eye colour: pale orange. Reduced pteridine levels in the head. Homozygous viability is 62% of wild-type.
GTP cyclohydrolase activity is severely reduced in the adult head, and moderately reduced in the adult body and prepupa of homozygotes. PurZ8/PurAA4 transheterozygotes have slightly reduced GTP cyclohydrolase activity in the prepupa and adult body, and severely reduced enzyme activity in the adult head. The viability in trans with other Pu alleles has been determined.
Class I Pu allele.
Class I allele: eye specific phenotypes.