Male 



Female 



Parents 



Yellow round 



Gametes 

 of parents 



Fy All yellow round 



Fj Gametes 



Green wrinkled 



Eggs 



YR 



Yr 



yR 



YR 



Yr 



yR 



y 



YYRR 



Yellow 

 round 



YYRr 



YYRr 



Yellow 

 round 



Yellow 

 round 



Yellow 

 round 



■j YyRr 



Yellow 

 round 



;} YyRR 



Yellow 

 round 



YYrr 



Yellow 

 v/rinkled 



Yellow 

 round 



Yyrr 



Yellow 

 wrinkled 



.:;1 YyRr 



Yellow 

 round 



yyRR 



Green 

 round 



yyRr 



Green 

 round 



y 



YyRr 



Yellow 

 round 



Yyrr 



Yellow 

 wrinkled 



yyRr 



Green 

 round 



^ 



yyrr 



Green 

 wrinkled 



Figure 409. The inheritance of two independent traits is shown in a cross between yellow- 

 round garden peas and green-wrinkled peas. Yellow and round are dominant genes in this case; 

 the recessive genes are green and wrinkled. 



582 



