Question

In the case of incomplete dominance, what is the phenotypic ratio of monohybrid cross in $F_2$ generation?

• A. 3:1
• B. 1:2:1
• C. 2:3:1
• D. 9:3:3:1

Answer 1

The correct option is B 1:2:1

In incomplete dominance, the phenotypic ratio of monohybrid cross in $F_2$ generation is 1:2:1, the same as the genotypic ratio. This scenario arises because neither allele is dominant; if both the alleles are functional, a red coloured phenotype is produced; if a single functional allele is present (heterozygous) an intermediate (pink) phenotype is formed.