TRIPLOID INTERSEXUALITY IN DROSOPHILA AMERICANA SPENCER

Triploid Intersexuality in Drosophila Americana Spencer.

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...

Selection on Codon Usage in Drosophila americana

Synonymous codons are not used at random, significantly influencing the base composition of the genome. The selection-mutation-drift model proposes that this bias reflects natural selection in favor of a subset of preferred codons. Previous estimates in Drosophila of the intensity of selective forces involved seem too large to be reconciled with theoretical predictions of the level of codon bia...

Neo-Y Chromosome of Drosophila americana amemkana

The extent of genetic degeneration of the nec-Y chromosome of Drosophila americana ama'cana has been investigated. Three loci, coding for the enzymes enolase, phosphoglycerate kinase and alcohol dehydrogenase, have been localized to chromosome 4 of D. a. americunu, which forms the neo-Y and neo-X chromosomes. Crosses between D. a. americana, and D. virilis or D. montana showed that the loci cod...

Intersexuality in the horse.