Figure 5-9. Series of "Split Fig- 

 ures" in Untreated Allium Root 

 Tip Cells. The sequence shown can 

 lead to both segregation and nu- 

 merical reduction of the chromo- 

 w* ^ '' '' '/^t^ S. somes. (From Wilson, G. B.. 



m Hawthorne, M. E., and Tsou, T. M., 



^ 1951. "Spontaneous and Induced 



Variations in Mitosis," Journal 



B, • Heredity, 42, Fig. 10, pp. 184-185.) 



P 



MITOSIS AND MEIOSIS / 133 



