If one of the 18cm F1 pigs is mated with one of the 6cm F2 pigs, what phenotypic ratio would be predicted if many offspring resulted? Diagram the cross. Note: The ratio should be 1:3:3:1 ; 6cm:10cm:14cm:18cm. However Drawing out the diagram I can not get it to work, pls help. I believe 18 cm genotype is AaBbCc and 6cm is aabbcc..