In dihybrid crosses, remember the genotypic ratio of 9:3:3:1 for offspring, where each number represents different combinations of dominant and recessive alleles.
Step 1: Understanding the genetic combinations. The genetic combinations provided are typical of a dihybrid cross, where each genotype represents a combination of alleles for two traits. Step 2: Analyzing the given probabilities. - \(RrYy\) has a probability of \( \frac{4}{16} \), representing the most common genotype for a dihybrid cross involving two heterozygous parents (RrYy x RrYy). - \(RrYY\) has a probability of \( \frac{2}{16} \), representing a common but less frequent genotype where one trait is homozygous dominant. Step 3: Concluding the correct pairs. Given the standard genotypic ratios for a dihybrid cross, pairs I and III (\(RrYy\) and \(RrYY\)) correctly reflect expected outcomes, matching the typical 9:3:3:1 ratio where \(RrYy\) and \(RrYY\) are parts of the 9 and 3 segments, respectively.
