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IB Biology HL D3.2.20 Hl Recombinants Questions

Identify recombinant allele combinations and explain how crossing over creates fewer recombinant than parental types in IB Biology HL D3.2.20.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify recombinant offspring or gamete chromosomes as allele combinations different from the parental combinations in a linked-gene test cross.
  • Explain that crossing over between linked loci produces recombinant types, which are fewer than parental types in observed offspring.

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Study D3.2.20 (HL)—Recombinants conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL D3.2.20 Hl Recombinants Questions question 1

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The diagram shows one of Thomas Hunt Morgan's crosses of Drosophila in the early 20th century.

Figure for Question IB Biology HL D3.2.20 Hl Recombinants Questions question 1 — IB Biology HL

Identify the recombinants.

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