Final answer:
In a Punnett square, the potential genotypes can be determined by crossing two purple flowers (Bb) from the F1 generation. The potential genotypes of the F2 offspring are BB, Bb, and bb, with a 25% chance for each genotype. In the cross Bb x bb, there is a 50% chance for both genotypes (Bb and bb), resulting in a 50% probability for both purple and white flowers.
Step-by-step explanation:
To determine the potential genotypes of F2 offspring, we need to use the Punnett square. In this case, F1 offspring are purple flowers represented by the genotype Bb. Crossed with each other, the possible genotypes of F2 offspring are BB, Bb, and bb, with a 25% chance for each genotype.
To calculate the probability of each phenotype from the cross Bb x bb, we can construct a Punnett square. The possible genotypes of the offspring are Bb and bb, with a 50% chance for each genotype. Since purple flowers (Bb) represent the dominant trait, the phenotype ratio will be 1:1, meaning there is a 50% chance of having purple flowers and a 50% chance of having white flowers.