Rabbits in a population differ in hind-leg length. In a class discussion about why longer hind legs become more common in later generations, one student says: “Rabbits that often sprint away from predators acquire alleles for longer hind legs, and pass those alleles to their offspring.”
Explain why the student's explanation is incorrect.
85 exam-style questions on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one has a worked solution and a mark scheme showing where the marks go.