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Principles Of Inheritance And Variation

Question

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In sweet pea, C and P genes are essential for flower colour. In absence of either or both the genes, the flowers are white. What will be the percentage of coloured flowers in the offspring of cross Ccpp x ccPp?

75%

25%

80%

50%

Solution

B.

25%

The mentioned cross in the question is a dihybrid.
Ccpp x ccPp (both are white)

Hence, ratio of coloured to white flowers is 1:3.

Therefore, the percentage of coloured flowers in offsprings is 25%.

Some More Questions From Principles of Inheritance and Variation Chapter

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Write down Mendel’s dihybrid Phenotypic ratio

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What do the symbols square and circle in a pedigree chart indicate ?

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