[The comparative analysis of the mutational variability and instability of the thi, Bd strains induced by exogenous viral DNA in Drosophila melanogaster].

Frequency of reversions to wild type varies for thi and its derivatives from 10(-2) to 10(-5). A broad spectrum of mutations arises in thi alleles and thi+ revertants. Among them there are r, w, Bd and new mutations causing scalloped wings with thickened veins in all the autosomes.

[Mutation variability and instability in the Drosophila melanogaster thickened 2 strain and its derivatives].

Mutations in Drosophila melanogaster thi2 strain obtained using exogenous viral DNA, and in the thi2 derivatives, have been studied. Revertants to the wild type arose with high frequency (1-2.10(-2)) in both 83f-7 (1-2.

Cytogenetic analysis of the 2B3-4--2B11 region of the X-chromosome of Drosophila melanogaster. I. Cytology of the region and mutant complementation groups.

There are, at least, 11 distinct single bands and one real doublet in the region 2B1-2--2C1-2 of the X-chromosome of Drosophila melanogaster. This figure coincides with that in Bridges' revised map with most of the "doublet" bands being artifacts. Three puffs appear in the region.