D3.2.8—SNPs and multiple alleles
SNPs are single-base DNA differences, and multiple alleles are more than two allele forms of one gene in a population.
- Syllabus
- First assessment 2025
- Objective
- D3.2.8
- Level
- SL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceNovember 2022
Most common paperPaper1
Typical marks1
Common command terms
- Identify
Recent exam appearances
November 2022Paper1 ["SL"] · TZ013[ 1 ]D3.2.8—SNPs and multiple alleles
May 2022Paper1 ["SL"] · TZ213[ 1 ]D3.2.8—SNPs and multiple alleles
Practice this objective
Coverage 2022–2022 · Updated 16 Jul 2026
Concept essentials
- An SNP is variation at a single nucleotide position.
- A population can have more than two alleles for one gene.
- A diploid individual still carries only two alleles for a gene.