VariationIB MYP Biology: Flashcards
What these 13 flashcards ask
- What is variation?
- What is continuous variation?
- What is discontinuous variation?
- Give two examples of continuous variation.
- Give two examples of discontinuous variation.
- What causes genetic variation to exist?
- What is environmental variation?
- Name a feature caused by genes only.
- Why do identical twins help us study environmental effects?
- Name the three sources of genetic variation.
- How does meiosis cause variation?
- What is random fertilisation?
- Why is variation useful to a species?
Exam questions on Variation
- A class in Auckland records several features of every student: height, blood group, eye colour, mass and whether the student can roll their tongue. The teacher uses the results to introduce the idea of variation within a species.Describe the difference between continuous and discontinuous variation.2 marks
- Researchers in Stockholm study identical twins who were separated at birth and raised in different countries. Identical twins have exactly the same genes because they come from the same fertilised egg.Explain why identical twins raised in different countries can have different heights as adults.2 marks
- A breeder in Vienna notices that the puppies in one litter, born to the same two parents, differ from each other and from their parents in coat colour and size. The smallest puppy had less access to food than its brothers and sisters.Outline three sources of genetic variation in the puppies.3 marks
Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).