A blue colour flower plant denoted by BB is crossbred with that of white colour flower plant denoted by bb

CBSE Class 10 CBSE Class 10 Science
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1

A blue colour flower plant denoted by BB is crossbred with that of white colour flower plant denoted by bb.

  1. State the colour of flower you would expect in their F1 generation plants.
  2. What must be the percentage of white flower plants in F2 generation if flowers of F1 plants are self-pollinated?
  3. State the expected ratio of the genotypes BB and Bb in the F2 progeny.
2

1 .
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F1 Generation
Note: All flowers in the F1 generation are blue.

2.When flowers of F1 plants are self-pollinated, Then

image

Ratio of blue flowered to white = 3:1

3.image

Hence BB : Bb : bb = 1 : 2 : 1 is ratio.