Effect of dynamic factors of space flight on the mutagenic effect of radiation. I. Occurrence of dominant lethal mutations during Drosophila melanogaster oogenesis

The modifying effect of dynamic space flight factors (DF) on radiation chromosomal damages in Drosophila oocytes of the 7-th and 14-th stages was studied. It has been found that the number of dominant lethal mutations increases under the simultaneous action of radiation and dynamic factors on oocytes-7. The magnitude of radiation effect on mature oocytes did not change upon additional action of DF. It is assumed that the modifying effect of DF on radiation damage may be a reason for discrepancy of flight experimental results.