Homozygous females produce few offspring at 29oC; at 16oC nuclei begin to degenerate in preblastoderm stage leading to irregular blastoderm and irregular gastrula.
fs(1)A13711 was claimed to be an allele of fs(1)1059 (Mohler and Carroll, 1984) but phenotype is not concordant with such a claim (Lindsley and Zimm, 1992).