Question

A blue colored flower denoted by BB is cross bred with that of white flower denoted by bb
a) State the color of the flower you expect in F1 generation?
b) What must be the percentage of the white flower plants in F2 generation if flowers of F1 generation plants are self pollinated?
c) State the expected ratio of the genotype BB and BB in F2 progeny​

Answer 1

(a) In the first generation i.e. in F, 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: