Hinton, Claude W. and Whittinghill, Maurice (1950) The Distribution of X-Ray Induced Crossovers from Curly Inversion Heterozygotes of Drosophila melanogaster Females. Proceedings of the National Academy of Sciences of the United States of America, 36 (10). pp. 552-558. ISSN 0027-8424 http://resolver.caltech.edu/CaltechAUTHORS:HINpnas50
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That crossing may occur in oogonial cells was suggested by the results of experiments by Whittinghill  in which crossing over was induced by x-rays in the X-chromosomes of Drosophila females homozygous for the c3G asynaptic factor. It had previously been demonstrated that induced crossovers recovered from Drosophila males were of spermatogonial origin [2,3]. Cooper's observations  of chiasmata in gonial cells of both sexes of Drosophila may provide cytological foundations for the hypothesis of gonial origin of some crossovers, particularly those which are x-ray induced. Somatic crossing over, the basis for the occurranece of twin spots in the hypodermis of Drosophilamales and females , closely parallels gonial crossing over in the formation of daughter cells which have become homozygous distally. The possible consequences of oogonial crossing over upon linking data, as recently discussed by Whittinghill , illustrate the need for further investigation of this phenomena. This paper reports the results of x-ray induced crossing over in Curly inversion heterozygotes of Drosophila melanogaster females, and these results are interpreted in relation to normal, or random, meiotic events as opposed to oogonial events of recombination.
|Additional Information:||Copyright © 1950 by the National Academy of Sciences Communicated by J. N. Couch, August 17, 1950 The authors wish to express their appreciation to Dr. Robert James Reeves, Head of the Department of Roentgenology of Duke University, for making x-ray facilities available; and to Mr. H. C. Yeatman of this Department for coding the testcross cultures.|
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|Deposited On:||27 Nov 2006|
|Last Modified:||26 Dec 2012 09:18|
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