How does natural selection change the frequency of genes or traits over many generations? biology students conducted an experiment mimicking genetic variation and coloration. students used different colored beans to represent animals that might be prey: mice, for example. a student in each group was the predator: a hawk. beans (mice) were randomly scattered on multicolored floor tiles and the hawk collected mice (beans) for 10 seconds. mice not eaten reproduced. three generations of data a shown in the table. which coat color provided the best protection from predators? a) red b) black c) white d) red striped