A-level Biology
Sign in
All learning paths
3.7 Genetics, populations, evolution and ecosystems
Paper 2 and Paper 3.
7 Lessons
Level 1
Genetic crosses, sex linkage and codominance
Sex linkage, codominance and multiple alleles
Core
Level 2
Linkage, epistasis and the chi-squared test
Linkage, epistasis and the chi-squared test
Exam-ready
Level 3
Populations and the Hardy-Weinberg principle
Populations and the Hardy-Weinberg principle
Core
Level 4
Selection, drift and speciation
Selection, drift and speciation
Core
Level 5
Populations in ecosystems and sampling
Populations in ecosystems and sampling
Core
Required practical 12: species distribution along a gradient
Exam-ready
Level 6
Succession and conservation
Succession and conservation
Core