1.7 – Variation (and cloning)

Pages 36 – 42 of the CGP revision notes.

Key questions

  • How are characteristics influenced by genes / the environment?
  • What are chromosomes / genes?
  • What are the differences between sexual / asexual reproduction?
  • How are plants cloned?
  • How does embryo cloning differ from adult cell cloning?
  • What are the issues relating to cloning?
  • How is genetic engineering done?
  • How have plants and animals been genetically modified?
  • What are the pros and cons of GM crops?
  • How are evolutionary trees drawn up?
  • How do mutations contribute to natural selection?
  • How did Lamarck’s theory differ from Darwin’s?