Q16 of 55 Page 1

A blue color flower plant denoted by BB is crossbred with that of white color flow plant denoted by bb. (a) State the color of flower you would expect in their F1 generation plants.

(b) What must be the percentage of white flower plants in F2 generation if flowers of F1 plants are self-pollinated?


(c) State the –expected ratio of the genotypes BB and Bb in the F2 progeny.

(a) In the first generation i.e. in F1 generation, all the flower plants will be of blue color. It can be shown as follows:


Untitled.png


(b) When flowers of f1 generation are self-pollinated:


Untitled.png


So, in F2 generation, there will be three blue Flowers and one white flower. So they ratio of blue flower plant to ratio of white flower plant is 3:1


But we need to find the ration percentage of white flower which is calculated as follows:


Percentage =


Percentage =


So, Ratio percentage of white flower plant is 25%


(c) The expected ratio of the genotypes BB and Bb in the F2 progeny is as follows:


Untitled.png


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