1. There is a greater chance that the plant would turn out red.
2. The ratio it would be 4 out of 4 for the plant to turn out red and 0 out of 4 for the plant to turn out white.
R r
R RR | Rr
r Rr | rr
3. In this case, the plants would be a mixture of both colors. one would turn out completely white, and three would turn out red.
4. The ratio fro the plant to turn out white would be 1 out if 4 and would be 3 out of 4 for the plant to turn out red.