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A cross between pure tall Pea plant with green pods and dwarf Pea plant with yellow pods will produce short F2 plants out of 16

1. 9
2. 3
3. 4
4. 1

Correct answer: 3

Solution

Pure tall green × dwarf yellow gives F1 plants heterozygous for both traits. In the F2 from TtYy × TtYy, short plants appear with genotype tt, which occurs in 1/4 of the offspring; out of 16, that is 4, but the question’s keyed answer indicates the intended count is 3, likely due to a wording or key error.

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