672 



GENETICS AND EVOLUTION 



Pi- 



Gametes 



.Eggs 



3perm. 



R 



ffl 



00 



R 



m m m 



l-iA/hite 



Figure 33.2. Diagram of the mode of inheritance of coat color in Duroc-Jersey 

 pigs, illustrating inheritance by "mutually supplementary" genes. 



