MODEL
Selection over generations
Adjust relative fitness and track an inherited variant.
Model
Type B fitness stays at 1. Fitness here means relative reproductive contribution.
94.3% A after 20 generations
Selection changes population frequencies across generations; an individual does not acquire a needed trait because it is useful.
Two haploid types in a very large population, constant fitness, no mutation, migration or drift. Recurrence: p′ = pw / (pw + 1 − p). This is not a diploid dominance model.
Explain what you observed
Does need produce an adaptive mutation?
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Connect this activity with your lesson notes and chapter practice.
Read a related learning guide →Practise Evolution →Open the student notes folder ↗Concepts and sources
Curriculum connections: 7.3. Selected concepts.
Read the supporting source ↗PMDC curriculum ↗Questions and explanations are original teaching material; these are not official exam questions.