Question

A pea plant with blue colour flower denoted by BB is cross-bred with a pea plant with white flower denoted by ww. (a) What is the expected colour of the flowers in their F1 progeny? (b) What will be the percentage of plants bearing white flower in 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...Explain how the ratio came..

Answer 1

BB * ww -----------------------------------Parent Line

B B * w w ----------------------------------Gametes

Bw Bw --------------------------------------F 1 Generation

Bw * Bw --------------------------------------F 1 generation

B w * B w ------------------------------------Gametes

BB Bw Bw ww -----------------------------F 2 generation

(a) Blue is the expected color in F 1 generation.

(b) Blue color : White color = 3:1

(c) BB : Bw = 1:2

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