Answer :

The cross between parents heterozygous for height, where tall is dominant (Tt × Tt) will produce ¾ tall plants (TT and Tt) and  ¼  short plants (tt).

If two heterozygous tall plants parents (Tt) are crossed, they will produce 1/4 TT (homozygous tall plants), 2/4 Tt (heterozygous tall plants) and 1/4 tt (homozygous short plants) , where tall is dominant and short is recessive. Therefore, 75% tall plants (TT, Tt) and 25% (tt) small plants will be produced. The phenotypic ratio is 3:1 (tall: dwarf).

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