PLATE 2 
A. —The F t wild X Tamworth boar and the second wild boar. 
B. —The Fj boar, sire of all the F 2 pigs of the Berkshire X Duroc-Jersey cross. 
C. —A self-red F 3 barrow. Berkshire X Duroc-Jersey cross. 
D. —An F a barrow, red with a sandy belly when bom, white when mature. Berk¬ 
shire X Duroc-Jersey cross. 
E. —A common type of “reversion.” A striped pig of ordinary mixed domestic 
ancestry. (Courtesy of the Department of Genetics, University of Wisconsin). 
F. —An Fo boar, red with a sandy belly. Berkshire X Duroc-Jersey cross. 
G. —An F 8 litter. Eight pigs of the n which showed stripes and light bellies. 
Berkshire X Duroc-Jersey cross. 
H. —A red-and-black F 3 pig showing the average amount of black. Berkshire X 
Duroc-Jersey cross. 
I. —A black-and-white F 3 pig showing the average amount of black. Berkshire 
X Duroc-Jersey cross. 
J. —The black-and-white F a pig which most nearly approached the Berkshire 
standard as to the amount of black. Berkshire X Duroc-Jersey cross. 
K. —Four litter mates from the F 3 generation. Note the variation in size. Berk- 
hire X Duroc-Jersey cross. 
