Although a monohybrid cross, the results in this case differ slightly from the first two crosses. You are dealing with plants here and after crossing a true breeding red and white variety of snapdragon, you find that the F1 are all pink. Selfing the F1 produces a unique F2. Can you explain the inheritance mechanism? As before, you might need to run the program several times before a trend in the ratios can be seen. Reset will clear all the windows, multiple selfings are effected by simply clicking on the SELFED button.