In pea plants, purple flower color, C, is dominant to white flower color, c. The table shows the frequencies of the dominant and recessive alleles in three generations of peas in a garden.Allele Frequency for Flower Color in PeasGenerationpq10.600.4020.640.3630.750.2540.800.20Which generation showed the greatest frequency of having one of each allele?

Having one of each allele means the plant is heterozygous (Cc). Its expected frequency is 2pq, where p and q are the frequencies of the two alleles. Generation 1 has 2(0.60)(0.40) = 0.48, which is greater than the corresponding frequencies for generations 2, 3, and 4, so generation 1 had the greatest frequency.

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