Mendel was a careful researcher who studied the inheritance of certain traits in garden peas. What are some of the research practices Mendel used?
Choose all that apply.
A. He crossed true-breeding pea plants.
B. He allowed eggs to be fertilized only by self-pollination.
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C. He analyzed his data mathematically.
D. He controlled variables by studying one or two traits at a time.
Answers: 1
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