[An electron microscopic analysis of the structure of the indirect flight musculature in heterozygotes for a new Mhc gene mutation of Drosophila melanogaster].

The ultrastructure of indirect flight muscle was studied in flies (imago) heterozygous for a new allele of the gene of heavy myosin chain. Analysis of the observed defects of myofibrils suggests that in the mutants completion of differentiation of the flight muscle is disturbed.