Final answer:
In the upper-right square of the Punnett square, we place the allele from the first parent (represented by a letter) and the allele from the second parent (also represented by a letter). The uppercase letter represents the dominant allele and the lowercase letter represents the recessive allele. In this case, the uppercase letter represents the allele for having freckles and the lowercase letter represents the allele for not having freckles.
Step-by-step explanation:
The Punnett square is set up to determine the probability of the child of a certain couple having freckles. In the upper-right square of the Punnett square, we place the allele from the first parent (represented by a letter) and the allele from the second parent (also represented by a letter). The uppercase letter represents the dominant allele and the lowercase letter represents the recessive allele. In this case, the uppercase letter represents the allele for having freckles and the lowercase letter represents the allele for not having freckles. Therefore, the correct answer for the upper-right square is F which represents the allele for having freckles.