What is the genotype frequency ratio typically seen in incomplete dominance?

In incomplete dominance, the phenotype of the heterozygote is a blend of the phenotypes of the homozygotes. When analyzing the genotype frequencies in a simple genetic cross involving incomplete dominance (such as a cross between two parent plants where one has red flowers and the other has white flowers, resulting in offspring with pink flowers), you would typically observe a specific ratio among the offspring.

The expected genotype frequencies from a monohybrid cross in incomplete dominance are characterized by a 1:2:1 ratio. This represents the genotypes of the offspring produced:

• 1 homozygous dominant

• 2 heterozygous

• 1 homozygous recessive

In this case, if we denote the alleles as "R" for red and "r" for white, the cross between two heterozygous individuals (Rr x Rr) results in:

• RR (homozygous dominant) producing red flowers

• Rr (heterozygous) producing pink flowers

• rr (homozygous recessive) producing white flowers

Thus, the combination results in one red (RR), two pink (Rr), and one white (rr) plant, leading to a genotype frequency ratio