Chapter 16 / 5 short lessons
Population genetics
Count allele copies, use Hardy-Weinberg with confidence, and explain why variation persists.
H2 Biology / 9477 / 2027 syllabus
What do you think?
An allele is recessive. Must it be rare?
Lessons
0 of 5 marked as readCount alleles, not just organisms
Calculate allele frequencies directly from diploid genotype counts.
About 5 minBuild the Hardy-Weinberg model
Connect random gamete combinations to p squared, 2pq and q squared.
About 6 minWork backwards from a recessive phenotype
Infer allele, genotype and phenotype frequencies from suitable equilibrium data.
About 6 minKnow when the model applies
Explain equilibrium assumptions and interpret departures without overclaiming.
About 6 minWhy harmful alleles can persist
Explain how recessive masking and balancing selection preserve genetic variation.
About 6 minWhat you will be able to do
- Separate allele, genotype and phenotype frequencies.
- Use and evaluate the Hardy-Weinberg model.
- Explain how harmful recessive alleles can remain in populations.
Spaced review
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