Q.

If a pink flowered snapdragon plant is crossed with another pink flowered snap dragon plant 

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a

all the offspring will form only pink flowers.

b

pink and red flowered plants are formed in 3 : 1 ratio

c

pink and white flowered plants are formed in 3 : 1 ratio

d

pink, red and white flowered plants are formed in 2 : 1 : 1 ratio.

answer is D.

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Detailed Solution

The pink flowered snapdragon plant is heterozygous (Rr). If two such plants are crossed, then there is formation of RR (red flowered), Rr (pink flowered) and rr (white flowered) plants in the offspring in 1 : 2 : 1 ratio.

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