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MHT CET Medical202622 April 2026Evening ShiftBiologyPrinciples of Inheritance and VariationActual

In the F₂ generation, the genotypic and phenotypic ratios are identical in ____.

Options

  1. AMendelian monohybrid cross
  2. BPleiotropy
  3. CCo-dominance
  4. DMultiple alleles

Correct answer

C. Co-dominance

Step-by-step solution

In a Mendelian monohybrid cross, the phenotypic ratio in the F₂ generation is 3:1 , whereas the genotypic ratio is 1:2:1 . In the case of co-dominance (and incomplete dominance), the heterozygous condition produces a distinct phenotype where both alleles are expressed equally. When two heterozygotes are crossed, the F₂ generation yields a genotypic ratio of 1:2:1 (homozygous dominant : heterozygous : homozygous recessive) and a phenotypic ratio of 1:2:1 . Thus, the genotypic and phenotypic ratios are identical in c

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