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Biol Bull 59: 128-133. (August 1930)
© 1930 Marine Biological Laboratory
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TIME OF DEVELOPMENT OF THE DIFFERENT SEXUAL FORMS IN DROSOPHILA MELANOGASTER

TH. DOBZHANSKY 1

1 CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA

1. The different sexual types known in Drosophila are characterized by different lengths of their development periods. Diploid females develop more quickly and supermales develop more slowly than the other sexual types, which are intermediate between these two extremes (see Table II).

2. There is observed no correlation between the length of development and the sex-determining ratio (i.e., the ratio between the number of X-chromosomes and the number of sets of autosomes present in the cells of a given individual).






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