In Japanese four-o'clock plants, the gene for red flower color (R) is incompletely dominant over the gene for white flower color (r). When a red plant (genotype: RR) is crossed with a white plant (genotype: rr), the following genotypic and phenotypic ratios can be predicted:
1. Genotypic ratio:
- 100% of the offspring will be Rr (heterozygous), as the red color gene (R) is incompletely dominant over the white color gene (r).
2. Phenotypic ratio:
- 50% of the offspring will have red flowers (Rr genotype, expressing the red color).
- 50% of the offspring will have pink flowers, resulting from the incomplete dominance of the red gene over the white gene.
