Start learning →

OJEE Incomplete Dominance — practice questions

Explore 1 free Incomplete Dominance questions in OJEE Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Incomplete Dominance with Quill →

Incomplete Dominance questions and exercises with answers

Showing questions 1–1 of 1.

In **incomplete dominance** (e.g. flower colour in *Mirabilis jalapa*), the F₂ phenotypic ratio from a cross of red × white is:Read the answer and worked solution →

Worked practice questions

In **incomplete dominance** (e.g. flower colour in *Mirabilis jalapa*), the F₂ phenotypic ratio from a cross of red × white is:

  1. 3 : 1
  2. 1 : 1
  3. 1 : 2 : 1 (red : pink : white)
  4. 9 : 3 : 3 : 1
Show answer and solution

Correct answer: C. 1 : 2 : 1 (red : pink : white)

RR (red) × rr (white) → F₁ Rr (**pink** — intermediate). Selfing Rr × Rr → 1 RR : 2 Rr : 1 rr → phenotypically 1 red : 2 pink : 1 white. Phenotypic ratio matches genotypic ratio because heterozygotes are visibly distinguishable.

Open this question →

How to practise

  1. Choose a Incomplete Dominance question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Biology topics

Molecular Basis of InheritanceSexual Reproduction in Flowering PlantsHuman ReproductionCell Cycle and Cell DivisionPrinciples of Inheritance and VariationPrinciples Of InheritanceReproductive HealthHuman Health and Disease