A Caltech Library Service

Preferential segregation of the fourth chromosomes in Drosophila melanogaster

Sturtevant, A. H. (1934) Preferential segregation of the fourth chromosomes in Drosophila melanogaster. Proceedings of the National Academy of Sciences of the United States of America, 20 (9). pp. 515-518. ISSN 0027-8424.

See Usage Policy.


Use this Persistent URL to link to this item:


The present study is concerned chiefly with the behavior of a duplicating chromosome derived from the undescribed scute allelomorph known as scute-10-2. This allelomorph, obtained by x-raying scute-10, is associated with a reciprocal 1-4 translocation. The X-chromosome is broken near its left end, between the loci of silver and broad, and the short terminal piece (loci from yellow to silver) is exchanged for a section of the fourth chromosome that includes all the known loci of that chromosome (with the possible exception of cubitus-interruptus, which is difficult to test, since this translocation shows the position effect recently described by Dubinin and Sidoroff(1)). The small chromosome, made up of the left end of X attached to the spindle-fibre region of 4, may be obtained in individuals (of either sex) that are otherwise normal diploids.(2) If the normal X's of such hyperploids carry the recessive gene for yellow, the flies are wild-type in appearance because of the presence of +y in the duplicating chromosome. This fact has been used, in the present experiments, to study the distribution of the fragment at meiosis.

Item Type:Article
Additional Information:© 1934 by the National Academy of Sciences. Communicated August 4, 1934.
Record Number:CaltechAUTHORS:STUpnas34
Persistent URL:
Alternative URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9527
Deposited By: Tony Diaz
Deposited On:30 Jan 2008
Last Modified:14 Nov 2014 19:20

Repository Staff Only: item control page