21. In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the
probability that the offspring will be short?
(A) 1
(B) 1/2
(C) 1/4
(D) 1/6
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統計: A(0), B(2), C(0), D(0), E(0) #2765584
統計: A(0), B(2), C(0), D(0), E(0) #2765584