Abstract
In Drosophila melanogaster, at least 7 amylase bands (isozymes) were detected on agar-gel zymograms. Amylase patterns were specific according to strains, and 7 strains with different amylase patterns were established. Amylase patterns of these strains were always controlled by a gene or genes linked very closely at locus 78 on the 2nd chromosome. They were assumed to be allelic and co-dominant with one another. The F1 individuals between any 2 strains with different amylase patterns showed mixed bands of the parental patterns, without showing hybrid band on the zymogram.