Question

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?

Answer 1

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

Step-by-step explanation:

• Red flower color is determined by the genotype R1R1,

• White flower color is determined by the genotype R2R2,

• Pink flower color is determined by the genotype R1R2.

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.