Does Preformed Cell Structure 



Play an Essential Role 



in Cell Heredity?* 



Tracy 3t. Sonneborn f 



Department of Zoology 

 Indiana University, Bloomington, Indiana 



f. tnti-odiU'tion 



This chapter raises and attempts to answer a simple, fundamental 

 question that is commonly ignored. Does the structure or organization 

 of a cell, aside from that of its chromosomes, play an essential role 

 in the determination of the structure of its cell progeny? This ques- 

 tion is a timely one. The underlying simpler and basic questions of 

 the nature of the gene and gene action, it is widely believed, will soon 

 be essentially solved and the time will be ripe for equally concen- 



* Contribution No. 716 from the Department of Zoology, Indiana University. 



f The author gratefully acknowledges the invaluable collaboration of Dr. Ruth V. 

 Dippell in the researches reported in the first half of this chapter. The investigations 

 were supported by grants from the American Cancer Society ( E80 and E81D), the 

 Atomic Energy Commission ( AT ( 11-1 ) -235). the Rockefeller Foundation, and In- 

 diana University. 



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