What is the genotypic ratio of dihybrid hybridization experiments conducted by Mendel whose phenotypic probability is 9 on 16?
a) 1:2:1:2:4:2:1:2:1
b) 9:3:3:1
c) 1:1:1:1:1:1:1:1:1
d) 3:1:3:1:3:1:3:1:3