CHROMOSOME ABERRATIONS IN ANIMALS 711 



Whiting, P. W. (1938a) Decrease in biparental males by X-raying sperm in Habro- 

 bracon. Proc. Penn. Acad. Sci., 12: 74-76. 



(1938b) The induction of dominant and recessive lethals by radiation in 



Habrobracon. Genetics, 23: 562-572. 



Whittinghill, M. (1938) The induction of oogonial crossing over in Drosophila 

 melanogaster. Genetics, 23: 300 306. 



(1947) Spermatogonial crossing over between the third chromosomes in the 



presence of the Curly inversions of Drosophila melanogaster. Genetics, 32: 

 608-614. 



(1950) Consequences of crossing over in oogonial cells. Genetics, 35: 38-43. 



Zirkle, R. E. (1949) Relationship between chemical and biological effects of ionizing 

 radiations. Radiology, 52: 846-855. 



Manuscript received by the editor May 1, 1951 



