In the unlinked dihybrid crosses Mendel performed, he generally started with two true-breeding parents that displayed different traits for both characters (e.g., one parent was true-breeding for purple flowers and tall stature, one parent was true breeding for white flowers and short stature). Explain the results he found in the offspring of such a cross. If these offspring were then crossed among themselves, What did he generally find in this next generation? Explain these results.