In hybridization, Tt × tt gives riseto the progeny of ratio(1) 2 : 1(2) 1 : 2 : 1(3) 1 : 1(4) 1 : 2

The cross Tt × tt refers to a monohybrid cross in genetics, where T and t are different alleles of the same gene.

Here's the step-by-step process:

1. Identify the genotypes of the parents. In this case, one parent is heterozygous (Tt) and the other is homozygous recessive (tt).

2. Determine the possible gametes each parent can produce. The heterozygous parent (Tt) can produce two types of gametes (T and t), while the homozygous recessive parent (tt) can only produce one type of gamete (t).

3. Create a Punnett square to determine the genotypes of the offspring. The Punnett square for this cross would look like this:

   | T | t ---|---|--- t | Tt | tt t | Tt | tt

4. Count the ratio of the different genotypes. In this case, we have two Tt and two tt, which gives a ratio of 1:1.

So, the correct answer is (3) 1 : 1.