Question

A pea plant with blue colour flower denoted by BB is crossbred with a pea plant with white flower` denoted by bb. a) What is the expected colour of the flower in their F1 progeny, b) What will be the percentage of the plants bearing white flowers in the F2 generation, when the flowers of F1 plants were selfed ? c) State the expected ratio of the genotype BB and Bw in the F2 progeny​

Answer 1

Answer:

(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:

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

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:

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:

Explanation: