Exercise 15 (Continued) 



Step 2. — On the following diagrams plot the same contrasted characters 

 showing the effect of dominance upon the appearance of the progeny. 

 The Second Phase of Mendel's Law 



F2 Generation. ' A- — j — ' 



DDOaQODDOC^OOOOOO 



Anceatral Generation 



Fl Generfttio: 



Step 3. — On the following diagrams plot the behavior of certain matings 

 to test the purity of an apparent dominant character. 



Ancestral Generation 11 J | 



t- ^ i 



F2 Generation. I 1 , 1 



DDDDDDDCfoOiOOOOOO 



58 



