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Q.

In the cross between true-breeding red-flowered (RR) and true-breeding white-flowered plants (rr) in snapdragons (Antirrhinum sp.), what is the phenotypic ratio observed in the F2 generation?

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a

All Pink

b

1 Red : 2 Pink : 1 White

c

3 Red : 1 White

d

1 Red : 1 Pink : 1 White

answer is B.

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Detailed Solution

 In incomplete dominance, an intermediate phenotype is obtained which does not match with any of its parental types. Hence, the ratio is 1(Red) :2(pink) :1(white).

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