3. Variation

Available for over a year

Dr Alex Lathbridge guides you through the most important GCSE Biology facts, with a few jokes thrown in too. In this third episode of our series all about inheritance, variation, and evolution, Dr Alex Lathbridge breaks down why variation happens within one species and the genetic and environmental causes of this variation. Dr Alex also looks at how mutations can cause genetic variation, and when mutations can lead to health conditions like sickle cell disease. Take a look on the BBC Bitesize website to find out more about this topic, with revision notes, quizzes and exam-style questions: https://www.bbc.co.uk/bitesize/guides/zsswgdm/revision/1 Suitable for: Combined science AQA Synergy AQA Trilogy Eduqas Edexcel OCR 21st Century OCR Gateway Single science AQA Eduqas Edexcel OCR 21st Century OCR Gateway