Variation and evolution -SAQs.docx

**[Questions]** 1. What are variations? Variations are different characteristics seen within the same species. 2. What are inherited variations? Inherited Variation are variations that are inherited through sexual reproduction from parents. 3. What are acquired variations? Acquired Variatio...

**[Questions]** 1. What are variations? Variations are different characteristics seen within the same species. 2. What are inherited variations? Inherited Variation are variations that are inherited through sexual reproduction from parents. 3. What are acquired variations? Acquired Variation are variations that are learned through life experiences. 4. What are some sources of variation? Meiosis, sexual reproduction 5. What are mutations? Mutations are a change in structure or amount of DNA these mutations can introduce new genes into populations which can be advantageous or disadvantageous. 6. What is a mutagen? A mutagen is an agent that causes a mutation. 7. What is a point mutation? A Point Mutation is a change in a specific gene e.g. Sickle cell anaemia. 8. What is a chromosome mutation? A Chromosome Mutation is a change in a chromosome e.g. Down Syndrome. 9. Define evolution. Evolution is the inheritable genetic change in a species over a long period of time in response to changes in the environment. 10. What is a species? A species is a group of similar organisms capable of reproducing to create fertile offspring. 11. Who proposed the theory of evolution? Charles Darwin and Alfred Wallace.