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In sweet peas, genes C and P are necessary for colour in flowers. The flowers are white in the absence of either or both the genes. What will be the percentage of coloured flowers in the offspring of the cross Ccpp x ccPp?
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25%
It is a dihybrid cross.
We know that Ccpp x ccPp
Male gametes are Cpcp
Female gemetes are cPcp
Hence, ratio = 1 (colour) : 3 (white)
i.e., 25% coloured flower.
We know that Ccpp x ccPp
Male gametes are Cpcp
Female gemetes are cPcp
Hence, ratio = 1 (colour) : 3 (white)
i.e., 25% coloured flower.
| Cp | cp | |
|---|---|---|
| cP | CcPp colour | cPcp white |
| cp | Cpcp white | cpcp white |
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