Genetics of Hermaphroditism in Drosophila virilis

An Analysis of the Chromosomes of the Two Sub-Species Drosophila Virilis Virilis and Drosophila Virilis Americana.

NCREASING attention is being focused on the use of Drosophila as a I convenient organism for investigating such fundamental problems as the formation of new species and interspecific sterility. Studies of the hybrid from the cross D. melarzogasterXD. simulans by PATAU (I935), and by HORTON (1939), and D. pseudoobscuraXD. miranda by DOBZHANSKY and TAN (1936), as well as studies of the hybrids fr...

The Arrangement of Genes in Drosophila Virilis.

cism misses the mark. It need only be stated that Castle was wrong in supposing that the cross-overs between yellow and white should be subtracted from the total before the white bifid cross-over value is calculated. If, as Castle states, he cannot conceive of a mechanism "which would tie two genes together in such a way that they will subsequently separate from each other oftener than they wil...

A Study of Intersexuality in Drosophila Virilis.

N THIS paper a detailed account of our study of intersexuality in DroI sophila virilis will be given. The progress of this work has been reported elsewhere (LEBEDEFF 1934a and b, 1938a and b). These intersexes are the result of mutative changes within the normal diploid system, and they differ from intersexes in other species genetically, morphologically and embryologically. Intersexes in Lyman...

Heterochromatic Patterns in Drosophila virilis Interphase Nuclei

A hybrid dysgenesis syndrome in Drosophila virilis.

A new example of "hybrid dysgenesis" has been demonstrated in the F1 progeny of crosses between two different strains of Drosophila virilis. The dysgenic traits were observed only in hybrids obtained when wild-type females (of the Batumi strain 9 from Georgia, USSR) were crossed to males from a marker strain (the long-established laboratory strain, strain 160, carrying recessive markers on all ...