Use Punnett square.
https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
If a tall plant (TT) is crossed with a short plant (tt), what percentage of the offspring will be short?
5 answers
50 percent
A Tall Tt is crosssd with a short plant tt
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From Wendey's head quarters we say it is 50% or "tt".