Answer:
Step-by-step explanation:
The genetic cross of Tt Rr X Tt rr is a monohybrid cross, meaning it involves only one trait (the dominant T allele for tallness and the recessive t allele for shortness in this case). The phenotype and genotype of the offspring can be determined using a Punnett square, which is a visual representation of all possible genetic combinations of the parents. Here is what the Punnett square for this cross would look like:
| Tt | Tt
--|--------|----
rr | Trr | Trr
Rr | TRr | TRr
The phenotype refers to the physical appearance of an organism, while the genotype refers to the underlying genetic makeup.
From the Punnett square, we can see that the offspring of this cross will all have the phenotype of tall (T) plants because the T allele is dominant over the t allele. The genotype of the offspring will be a mixture of the two parents, with half of the offspring having the genotype Tt Rr (TRr) and the other half having the genotype Tt rr (Trr).