HEREDITY IN PLANTS, ANIMALS, AND MAN. 363 
The constitution of the original parents will be 
Y Ww GR 
YW GR 
Yellow (Green 
wrinkled. round. 
Gametes :— Y W. GR. 
The Hybrid must therefore be YW 
GR 
The Gametes from this hybrid are :— 
Females. Yaw. GYR GR -G Ww: 
Males ; YW. CPR: GR, G W. 
The second (F.2.) generation will therefore give (see Diagram 5) :— 
YW YR GR GW 
YW YW YW YW 
Yellow Yellow Yellow Yellow 
wrinkled. round. round. wrinkled. 
YW YR GR GW 
YR YR SE iks, YR 
Yellow Yellow Yellow Yellow 
round. round. round. round. 
YW YR GR GW 
GR GR GR GR 
Yellow Yellow Green Green 
round. round. round. round. 
YW YR GR GW 
GW GW GW GW 
Yellow Yellow Green Green 
wrinkled. round. round. wrinkled. 
That is 9 Yellow round, 3 Yellow wrinkled. 
3 Green round, 1 Green wrinkled. 
It will be seen by an examination of Diagram 5 that the yellow rounds 
of the second hybrid generation have not all the same constitution. 
Some of them carry a factor for green, which being recessive does not 
appear in the visible result of the experiment ; some carry a factor for 
