If a pure tall plant is crossed with a pure dwarf one, the ratio of tall pure dwarf in the F 2 generation after selling F1 plant will be___________________?
A. 1:1
B. 1:2
C. 2:1
D. 3:1
If a pure tall plant is crossed with a pure dwarf one, the ratio of tall pure dwarf in the F 2 generation after selling F1 plant will be___________________?