A Caltech Library Service

The effect of temperature on the viability of superfemales in Drosophila melanogaster

Dobzhansky, Th. (1928) The effect of temperature on the viability of superfemales in Drosophila melanogaster. Proceedings of the National Academy of Sciences of the United States of America, 14 (8). pp. 671-675. ISSN 0027-8424. doi:10.1073/pnas.14.8.671.

See Usage Policy.


Use this Persistent URL to link to this item:


The superfemale is an individual having three X-chromosomes and two sets of autosomes. It has also many external characteristics by means of which it can be easily distinguished both from the normal sexes and from other sexual forms, i.e., intersexes and supermales. The superfemales arise in several kinds of genetical experiments concerned with abnormal chromosomal situations, such as in the progeny of the attached X-chromosome female, of the triploid female and in cases of non-disjunction of the X-chromosomes. But the frequency of superfemales found in cultured is always very much below that which might be expected theoretically on the basis of a knowledge of the genetic situation in a given case. Therefore, the superfemale can be considered as a typical semilethal form, which only relatively rarely reaches the imago stage.

Item Type:Article
Related URLs:
URLURL TypeDescription
Additional Information:© 1928 by the National Academy of Sciences. Communicated June 20, 1928. [Th. D. was a] Fellow of the International Education Board.
Issue or Number:8
Record Number:CaltechAUTHORS:DOBpnas28
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7403
Deposited By: Tony Diaz
Deposited On:12 Feb 2007
Last Modified:08 Nov 2021 20:42

Repository Staff Only: item control page