Ser1/+ adults display a wing-notching phenotype.
Ser1/+ wings have a notched phenotype.
Heterozygotes exhibit a wing notching phenotype.
Wing margin phenotype not affected by Su(dx)sp.
Wings of Ser1/+ and hemizygous Ser1 notched at tip; deepest notch at second posterior cell. In triploids, one dose of Ser1 overlaps wild type. As with other Ser alleles expression suppressed by H and N. Dominant wing phenotype; homozygous viable.
Ser1 is homozygous viable; initially thought to be homozygous lethal, but lethality removable by recombination; the closely linked lethal persists in many Ser1-bearing chromosomes. Homozygous Ser1 produces extreme incision of wing margins especially in second posterior cell.