OCR GCSE Biology B1 Gateway - concept maps and summaries

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OCR GCSE Biology B1 Gateway - concept maps and summaries

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OCR GCSE Biology B1 Gateway - concept maps and summaries

  1. 1. B1.1 Fitness and health
  2. 2. B1.2 Health and diet
  3. 3. B1.3 Preventing diseases
  4. 4. B1.4 Infectious diseases
  5. 5. B1.6 The eye
  6. 6. B1.7 The nervous system
  7. 7. B1.8 Drugs
  8. 8. B1.9 Tobacco and alcohol
  9. 9. B1.1 0 Controlling body temperature
  10. 10. B1.11 Controlling blood glucose levels
  11. 11. B1.12 Controlling plant growth
  12. 12. B1.16 Variation
  13. 13. Alleles Genetic variation Gametes Caused by Male and female sex cells are Different versions of the cells DNA code are B1.14 Genetic variation Contain only 23 chromosomes and all are different 1. Gamete formation – splitting of the male and female cell in gamete formation leads to random different sex cells. 2. Fertilisation – when gametes combine during fertilisation the 23 chromosomes from the male and female randomly form the 46 chromosomes of the new baby 3.Mutations – spontaneous incorrect division of DNA OR environmental factors such as aggressive chemical attack, UV, X rays or gamma rays on cells
  14. 14. B1.15 Human characteristics
  15. 15. B1.16 Inherited disorders
  16. 16. B1.16 Inherited disorders

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