Two strains of Drosophila melanogaster, one outbred, recently derived
from nature, and the other created by intensive directional selectiona
l on phototactic behavior for 19 years, were used to test the hypothes
is that developmental stability is influenced by parental age. Three c
haracters were examined: sternopleural bristle number, wing length, an
d wing area. The results do not support any relationship between paren
tal age, either young or old, and developmental stability in offspring
.