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
- HL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceMay 2014
Most common paperPaper1
Typical marks1
Common command terms
- Identify
Recent exam appearances
May 2014Paper1 ["HL"] · TZ211[ 1 ]D3.2.8—SNPs and multiple alleles
Practice this objective
Coverage 2014–2014 · 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.