During Mendel's second set of experiments, he allowed the F, offspring from the first experiments to self-pollinate. Which of the following best describes the results?
A. About 25% of the F2 offspring expressed a different version of the studied trait than the parents had.
B. All of the F2 offspring expressed the same version of the studied trait as the parents had.
C. All of the F2 offspring expressed a different version of the studied trait than the parents had
D. About 25% of the F2 offspring expressed the same version of the studied trait as the parents had.
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