In a Certain Variety of Plants, a Cross Between a Red-Flowered

question 134

Short Answer

In a certain variety of plants, a cross between a red-flowered plant and a white-flowered plant produced an all-red flower F ₁. In the F ₂ there were 140 red-flowered plants, 50 cream-flowered plants, and 65 white-flowered plants.
(a) Offer an explanation for this F ₂ ratio.
(b) What ratio would be produced in a testcross of the F ₁ hybrid?
(c) What ratio would be produced if all the white-flowered F ₂ plants were crossed among themselves?

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