amorphic allele - genetic evidence
496bp deletion which removes part of exon 1 and the first exon-intron junction of Gat.
496bp deleted from the Gat gene starting just downstream of the ATG.
lethal - all die during embryonic stage
lethal - all die during embryonic stage (with Df(4)GatΔ64kb)
The gross morphology of homozygous mutant embryos is normal with respect to Fas2[+] axonal morphology and en[+] neuron numbers.