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. Which generation showed the greatest frequency of having one of each allele?

Generation 1

Explanation:

Considering the following frequency table:

Generation     f(p)          f(q)

       1              0.6           0.4

       2             0.7            0.3

       3             0.8            0.2

Then, the genotipic frequencies in each generation is:

Generation     f(p)      p²         f(q)      q²      2pq     p² + q² + 2pq= 1

       1              0.6       0.36      0.4    0.16     0.48    0.36 + 0.16 + 0.48 =1

       2             0.7       0.49      0.3     0.09   0.42     0.49 +  0.09 +0.42 = 1    

       3             0.8       0.64      0.2     0.04   0.32     0.64 + 0.04 + 0.32  1