A population of wild rabbits contains different alleles that affect resistance to a disease. The disease spreads through the population.
Which statement correctly explains how an allele for greater disease resistance could become more common over several generations?
Rabbits with greater resistance are more likely to survive, so the allele spreads even if the survivors do not reproduce.
Rabbits become resistant after recovering from the disease, and this acquired resistance is inherited by their offspring.
Rabbits with greater resistance are more likely to survive and reproduce, and their offspring may inherit the resistance allele.
The disease causes mutations for resistance in rabbits, and these new alleles are passed to their offspring.
122 exam-style questions on OCR GCSE Biology 5.2 Natural selection and evolution, covering 5.2.1 Genetic variation within a population, 5.2.2 Developments in classification systems, 5.2.3 How evolution occurs through natural selection, 5.2.4 Evolution as change over time, 5.2.5 Evidence for evolution, and 5.2.6 Darwin and Wallace. Each one has a worked solution and a mark scheme showing where the marks go.