In peas, a pure tall plant (IT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be:

1:1

When pure tall plant TT is crossed with pure short plant tt, all ‘Tt’ offspring are obtained in the F1 generation. When selfing of these F1 generation plants is done, the offspring obtained are ‘TT’ ‘Tt’ ‘Tt’ ‘tt’- in the ratio 3:1 (Tall : short), where pure tall plant and pure short plant are in the ratio 1:1(TT and tt).

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