Flower color in four-o’clock plants is under the control of a single gene. red flower color is determined by the genotype r1r1, and white flower color is determined by the genotype r2r2. if red-flowered plants are crossed with pink-flowered plants, and 1,600 seeds are produced, how many are expected of each possible phenotype?

800 red-flowered seeds and 800 pink-flowered seeds are expected to be produced.

Explanation:

The cross of red flowers with pink flowers produce 1,600 seeds. This is:

P)                      R1R1  x R1R2

Gametes)       R1    R1   R1    R2

F1)                    Punet square              

                            R1            R1

               R1        R1R1         R1R1

               R2       R1R2        R1R2

Genotype: 50% Homozygote

                      50% Heterozygote

Phenotype: 800 Red flower seeds, 50% over the total.

                      800 Pink flower seeds, the other 50% over the total.