CBSE Class 10 Science 2015 Term II Outside Delhi Set 2

Question : 10

Total: 12

A pea plant with blue colour flower denoted by BB is cross-breed 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.

Solution:

(a) F1 progeny will have blue coloured flowers as blue is dominant.
(b) On self pollination in F2 generation white flowers will be 25%.
(c) Ratio of blue and white in F2 progeny will be 1:2.

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