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PUCET (Punjab) Co Dominance — practice questions

Explore 1 free Co Dominance questions in PUCET (Punjab) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Co Dominance questions and exercises with answers

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In **co-dominance** (e.g. coat colour in cattle), the F₁ of a red × white cross is:Read the answer and worked solution →

Worked practice questions

In **co-dominance** (e.g. coat colour in cattle), the F₁ of a red × white cross is:

  1. Red
  2. White
  3. Roan (red AND white hair together)
  4. Pink
Show answer and solution

Correct answer: C. Roan (red AND white hair together)

**Co-dominance:** both alleles are expressed equally. RR × WW gives F₁ RW = **roan** — coat has a mixture of red and white hairs (not blended pink). F₂ ratio is 1 red : 2 roan : 1 white. ABO blood groups (IA, IB co-dominant) are another classic example.

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