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

question 51

Essay

In a certain variety of plants, a cross between a red-flowered plant and a white-flowered plant produced an all-red flower F₁.In the F₂ there were 140 red, 50 cream, and 65 white.
(a)
Offer an explanation for this F₂ ratio.
(b)
What ratio would be produced in a testcross of the F₁ hybrid?
(c)
What ratio would be produced if all the white F₂ plants were crossed among themselves?

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