Why are f2 phenotypic and genotypic ratio same in a cross between red-floweres snapdragon and white flowered snapdragon plant?Explain with the help of a cross?
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Red flowered snapdragon ×white flowered snapdragon
RR × rr
R × r
Rr
(Pink)
Rr × Rr (selfing)
RR Rr Rr rr
(Red) (Pink) (white)
Phenotypic ratio-1:2:1
Genotypic ratio1:2:1
It deviates from Mendel law of dominance. It shows blending and hence incomplete dominance. So,the genotypic and phenotypic ratios are same.
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Due to incomplete dominance
Explanation:
The progeny of incomplete dominance is intermediate of parents
In this cross one red one white and one pink colour flower is formed
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