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D3.2.20 (HL)—Recombinants

Recombinants have allele combinations different from parental combinations because crossing over reshuffles linked genes during meiosis in inheritance problems in inheritance problems.

Syllabus
First assessment 2025
Objective
D3.2.20
Level
HL

Exam analysis

Chance of appearing5%of analysed past papers
Latest appearanceMay 2022
Most common paperPaper1
Typical marks1

Common command terms

  • Deduce
  • Identify

Recent exam appearances

May 2022Paper1 ["HL"] · TZ136[ 1 ]D3.2.20 (HL)—Recombinants
May 2021Paper1 ["HL"] · TZ136[ 1 ]D3.2.20 (HL)—Recombinants
November 2019Paper2 ["HL"] · TZ02(b)[ 1 ]D3.2.20 (HL)—Recombinants
November 2015Paper2 ["HL"] · TZ04(c)[ 1 ]D3.2.20 (HL)—Recombinants
November 2014Paper1 ["HL"] · TZ034[ 1 ]D3.2.20 (HL)—Recombinants
Practice this objective

Coverage 2012–2022 · Updated 16 Jul 2026

Concept essentials

  • Recombinants differ from parental allele combinations.
  • Crossing over produces recombinant chromosomes during meiosis.
  • Recombination frequency can indicate distance between linked loci.
ConceptIB Biology HL