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OJEE Test Cross — practice questions

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

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A **test cross** is the cross of an F₁ hybrid (or unknown dominant) with:Read the answer and worked solution →

Worked practice questions

A **test cross** is the cross of an F₁ hybrid (or unknown dominant) with:

  1. Pure dominant parent
  2. Homozygous recessive parent
  3. Another heterozygous individual
  4. F₂ generation
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Correct answer: B. Homozygous recessive parent

Test cross = hybrid × homozygous recessive (e.g. Tt × tt). The progeny ratio reveals whether the dominant parent is TT (all tall offspring) or Tt (1:1 tall:dwarf), thereby disclosing the genotype.

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