When crossing two Tt plants (where T represents the dominant allele for tall and t represents the recessive allele for short), you can set up a Punnett square to visualize the genetic outcomes. Here's how it would look:
T t
+---------
T | TT | Tt |
+---------+
t | Tt | tt |
+---------+
Genotypes:
- TT (homozygous dominant): 1 square
- Tt (heterozygous): 2 squares
- tt (homozygous recessive): 1 square
Ratio:
The genotypic ratio from this cross would be:
- 1 TT : 2 Tt : 1 tt
Phenotypes:
If T is tall and t is short, the phenotypes would be:
- 3 Tall (TT and Tt)
- 1 Short (tt)
This gives a phenotypic ratio of:
- 3 Tall : 1 Short