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F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of:

1. Co-dominance
2. Dihybrid cross
3. Monohybrid cross with complete dominance
4. Monohybrid cross with incomplete dominance

Correct answer: Monohybrid cross with incomplete dominance

Solution

In incomplete dominance, the heterozygote shows an intermediate phenotype, so the F2 phenotypic ratio mirrors the genotypic ratio of 1:2:1. This is why the same ratio appears for both genotype and phenotype in a monohybrid cross.

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