2.4 Variation and evolution

Practice questions on Variation and evolution

• Describe how a mutation in a gene could affect the phenotype of an organism. (4 marks, Describe)
• Explain how the phenotype of an organism is determined by both its genotype and the enviro… (4 marks, Explain)
• Explain how sexual reproduction produces offspring with greater genetic variation than ase… (4 marks, Explain)
• Describe how the order of bases in a gene determines which protein is made during protein … (4 marks, Describe)
• Explain how natural selection can lead to a change in the inherited characteristics of a p… (4 marks, Explain)
• Explain how the fossil record provides evidence for evolution. (4 marks, Explain)
• A population of Arctic foxes has individuals with either thick fur or thin fur. Explain ho… (4 marks, Explain)
• A population of moths lives in a woodland area. Some moths have a pale wing colour and som… (4 marks, Explain)
• Describe how a mutation can lead to extinction of a species if natural selection occurs to… (4 marks, Describe)
• Explain why two organisms that reproduce sexually are unlikely to produce offspring with i… (4 marks, Explain)