A pea plant with blue color flower by $B B$ is cross-bred with a pea plant with white flower denoted by $w w$ .
a) What is the expected color of the flowers in their F $_{1}$ progeny?
b) What will be the percentage of plants bearing white flower in F $_{2}$ generation, when the flowers of F $_{1}$ plants were selfed?
c) State the expected ratio of the genotype $B B$ and $B w$ in the F $_{2}$ progeny?

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Solution

The cross can be represented as shown in the figure.
a) The color of flowers in $F_{1}$ progeny is blue.
b) The phenotypic ratio of blue and white flowers in $F_{2}$ generation is 3 : 1
So, percentage of plants bearing white flowers in $F_{2}$ generation = 1/4 x 100 = 25%
c) The ratio of genotype BB and Bw in F2 progeny: 1: 2

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