An ##F_1## plant that is homozygous for shortness is crossed with a heterozygous ## F_1## plant. What is the probability that a seed from the cross will produce a tall plant?

Homozygous short tt plant crossed with heterozygous tall Tt plant will yield short and tall plants in 1:1 ratio. Hence the probability of a seed giving rise to a tall plant would be 50%.

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