26-25 



THE YEAST CELL 



Table 26' 12 



Distribution of spores of contrasting phenotypes (P and 

 p) among heterozygous asci produced by mating clones of 

 the corresponding contrast ing phenotypes. 



Table 26-13 



Calculated frequencies of contrasting phenotypes ex- 

 pected on tetrad analysis of aono-, di-, tri-, and tetra- 

 hybrid heterozygotes when a single epistatic gene is 

 sufficient to produce the phenotype. 



