In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall to short plants in F2 is?1:33:11:12:1

The cross between a pure tall plant (TT) and a short plant (tt) is a classic example of a monohybrid cross in genetics. Here's how you can determine the ratio of pure tall to short plants in the F2 generation:

1. First, cross the pure tall plant (TT) with the short plant (tt). The result in the F1 generation will be all heterozygous tall plants (Tt), because the tall trait (T) is dominant over the short trait (t).

2. Next, cross the F1 generation plants (Tt) with each other. This is where we get the F2 generation.

3. The possible combinations in the F2 generation are TT, Tt, tT, and tt.

4. The ratio of pure tall (TT) to short (tt) plants in the F2 generation is therefore 1:1.

So, the correct answer is 1:1.