CAIE IGCSE Biology 18.3.3 Artificial Selection over Generations
Practise applying repeated artificial selection to improve crop plants or domesticated animals over many generations.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- outline repeated selection and breeding over many generations to strengthen a chosen feature
- apply artificial selection to a named crop or animal and state the resulting practical benefit
18.3.3—How selective breeding by artificial question 1
Tasmania is an island off the south coast of Australia. Sheep were introduced to Tasmania in the nineteenth century.
Fig. 3.1 shows the population of sheep in Tasmania from 1820 to 1940. The dashed line shows the trend in the population growth.
The sheep that were first introduced to Tasmania were not well adapted to the environment.
Describe how farmers can use selective breeding to improve their sheep so that they are better adapted to the environment.
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