# Describe the differences between continuous variation and discontinuous variation, giving one example of each type.

> Cambridge International IGCSE Biology (0610) — 18.1 Variation · Describe · 4 marks

## Mark scheme (4 marks)

1. Continuous variation produces a range of phenotypes between two extremes / cannot be placed into distinct categories
2. Discontinuous variation produces distinct categories / a limited number of discrete groups
3. Continuous variation is influenced by both genes and environmental factors; discontinuous variation is generally influenced by genes alone
4. A correct example of continuous variation AND a correct example of discontinuous variation

## Key terms

- [continuous variation](https://www.gradenine.co.uk/glossary/continuous-variation)
- [discontinuous variation](https://www.gradenine.co.uk/glossary/discontinuous-variation)

## Related

- [Revision notes for Cambridge International IGCSE Biology (0610)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

---
Source: [GradeNine](https://www.gradenine.co.uk/q/describe-the-differences-between-continuous-variation-852cf4be) · Published by Druglandscape Ltd.