Question

Two pink flowered Snapdragon plants (Rr) are self pollinated. Probability of offspring having white flowers is ________.

• A. 25%
• B. 50%
• C. 75%
• D. 2.5%
• E. 7.5%.

Answer 1

The correct option is A 25%

A red flowered Snapdragon(RR) is crossed to white flowered Snapdragon(rr). The F1 individuals are Pink flowered(Rr). When F1 individuals are self crossed, in the F2 generation, 1 plant with red flowers(RR-25%), 2 plants with pink flowers(Rr-50%), 1 plant is with white flowers(rr-25%) are formed. The phenotypic ratio is 1:2:1 and genotypic ration is 1:2:1.

So, the correct option is ‘25%’.