ON SOME PHENOMENA IN DROSOPHILA RELATED TO SO-CALLED GENIC CONVERSION

Abstract

Two cases are described in Drosophila which could be interpreted as conversion. But in these cases the Bar duplication and triplication are involved, which permits an interpretation in terms of unequal crossing-over, which, however, occurs in all gametes, not merely a few crossover gametes. The happenings are under control of another locus, which in one case can be separated from Bar by crossing-over. The details can be understood best by assuming a transduction of a Bar segment under control of a transductor locus. A final proof by isolating this locus was missed. In the 2d case, the same phenomenon was combined with the production of infrabar and what looked like its reciprocal, if a break within a Bar segment was involved in the transduction (unequal crossing over). The final proof for this interpretation is still missing.[long dash]Auth. summ.