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CBSE Class 10 Science 2015 Term II Outside Delhi Set 2

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Question : 10 of 12
Marks: +1, -0
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 F1F_1 progeny ?
(b) What will be the percentage of plants bearing white flower in F2F_2 generation, when the flowers of F1F_1 plants were selfed?
(c) State the expected ratio of the genotype BBB B and BwB w in the F2F_2 progeny.
Solution:  
(a) F1F_1 progeny will have blue coloured flowers as blue is dominant.
(b) On self pollination in F2F_2 generation white flowers will be 25%25\%.
(c) Ratio of blue and white in F2F_2 progeny will be 1:21: 2.
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