FB 



-@- 



11 



-@- 



Fig. 24-2 Maps of 

 4 chromosomes of Saccha- 

 romyces. The circled 

 figures were derived from 

 the graph (fig. 24-1) and 

 data in Table 3, The 

 other figures were cal- 

 -}- culated by standard re- 

 j. combination methods. There 

 are indications that an 

 excess of 2-strand double 

 exchanges occur across 

 the centromere just as in 

 Neurospora. This is sug- 

 gested by the fact that 

 the recombinatio'n of AD 

 and PN are 48 while the 

 recombinations of PN and 

 IN are only 25. 



hi 



24-7 



