Purple white and lavendar four oclock flowers why did the four o'clock flower plant give three phenotypes instead 2 is a genotype that is 2:2 Rr and rr.
The 4'o clock plant, phenotypes , exhibits partial dominance in flower colour, which is why the F1 plant produced by crossing a pure Red flowered plant (RR) with a pure White flowered plant (rr) has pink flowers (Rr).When an F1 plant (Rr) crosses with a pure white flowering plant (rr), the resulting plant will have a genotype that is 2:2 Rr and rr.
The phenotypic, however, will be 2 pink and 2 white at a ratio of 2:2.
The offspring's phenotypic ratio will be 2:2.
Rr × rr
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Rr rr rr
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