Question

a blue coloured flower denoted by BB is cross bred with that of white coloured flower plant debited by bb​

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:

Answer 2

for f1 generation ....

phenotipic ratio---- 1 :1

genotypic ratio ----- 1 : 1

● in f1 generation all are blue coloured

for f2 generation ...

phenotypic ratio --- 3:1

genotypic ratio --- 1 : 2 : 1

●in f2 generation 3 are blue and 1 is white ...

cross is given of f1 and f2 ...

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