Question

A violet colour flower plant denoted by VV is crossed with a white colour flower plant denoted by vv
(A) what is the colour of flower expected in f1 progeny?
(B) write the percentage of plants bearing white flowers in f2 generation when the flowers of f1 plants were selfed.
(C) give the genotypic and phenotypic ratios of the f2 progeny with the help of a cross.

Answer 1

Answer:

Explanation:

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: