Abstract

In 1954, Marvin Wasserman, in his initial cytological analysis of the repleta species group of Drosophila, discovered there were six “mulleri-like” species united and set apart from the others by one fixed inversion common to all six forms and five other inversions shared among the species in various combinations, even though in the homozygous condition. Also of special interest, which was not considered an issue at the time, was the fact that three of the species, when hybridized, showed no inversions in the salivary chromosomes; D. mulleri, D. aldrichi and D. wheeleri were homosequential in banding pattern (Wasserman, 1954).

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