Why are f2 phynotypic and genotypic …
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Meghna Thapar 4 years, 11 months ago
In snapdragon (Antirrhinum ****) the cross between a red-flowered plant (RR) and a white-flowered plant (rr) results in all pink flowered (Rr) plants in the F1 generation. A self-cross between two F1 plants results in red, pink and white flowers in the ratio of 1:2:1. The genotype of the resulting plants is also in the ratio of 1:2:1 for RR (red), Rr (pink) and rr (white) flowered plants. The cross can be shown as in the image. This is called incomplete dominance. Due to this reason, the F2 phenotypic ratio and genotypic ratios are same in a cross between red-flowered and white flowered snapdragon plants.
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