D3.2.3—Genotype
A genotype is the allele combination an organism carries for a gene or set of genes in inheritance problems in inheritance problems.
- Syllabus
- First assessment 2025
- Objective
- D3.2.3
- Level
- SL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceMay 2025
Most common paperPaper2
Typical marks1
Common command terms
- Identify
- Distinguish
- Define
Recent exam appearances
May 2025Paper2 ["SL"] · TZ34(a)[ 1 ]D3.2.3—Genotype
November 2015Paper2 ["SL"] · TZ03(c)(i)[ 1 ]D3.2.3—Genotype
Practice this objective
Coverage 2015–2025 · Updated 16 Jul 2026
Concept essentials
- A genotype records the alleles an organism carries.
- Homozygous and heterozygous genotypes differ in whether the two alleles match.
- Genotype can be inferred from crosses, pedigrees or offspring patterns.