Fig. 9-6. Salivary-gland chromosomes of Drosophila melanogaster. Rearrangements 

 detected in larval progeny of irradiated fathers, (a) Duplication of terminal section 

 of left limb of second chromosome, (b) Reciprocal translocation between the Y 

 chromosome and the right limb of the third chromosome, (c) Reciprocal transloca- 

 tion between the left limb of the second chromosome and the right limb of the third 

 chromosome, (d) An inversion-translocation complex involving breaks in 2L, 2R, 

 and 3L. (Photographs of preparations by the author.) 



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