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6.11 Selective breeding of animals
Exam question
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Describe how selective breeding could produce cows with a higher milk yield.
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Total for this question: 4 marks
6.11 Selective breeding of animals
Exam question
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Explain why bulls cannot be selected directly for milk yield.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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Which feature might be selected for in beef cattle?
(1)Total for this question: 1 mark
6.11 Selective breeding of animals
Exam question
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Explain why inbreeding can cause health problems.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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Give two characteristics selected for in sheep.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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Suggest one welfare concern about selective breeding of animals.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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Explain how artificial insemination speeds up selective breeding.
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Total for this question: 2 marks
6.11 Selective breeding of animals
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Explain why a farmer may breed chickens for both egg-laying and disease resistance.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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Illustrative data.
| Year | Milk yield / litres per cow per year |
|---|---|
| 1980 | 4 800 |
| 1990 | 5 600 |
| 2000 | 6 500 |
| 2010 | 7 400 |
| 2020 | 8 200 |
Calculate the percentage increase in milk yield from 1980 to 2020.
(2)Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
Mark points shown after marking
| Year | Milk yield / litres per cow per year |
|---|---|
| 1980 | 4 800 |
| 1990 | 5 600 |
| 2000 | 6 500 |
| 2010 | 7 400 |
| 2020 | 8 200 |
Suggest and explain a reason, other than selective breeding, for the increase in milk yield.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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Explain why dog breeds look very different even though they are one species.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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Compare selective breeding and genetic modification.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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State one disadvantage of selective breeding in animals.
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Total for this question: 1 mark
6.11 Selective breeding of animals
Exam question
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Explain why selective breeding produces animals that look similar.
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Total for this question: 2 marks
6.11 Selective breeding of animals
Exam question
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Identify the parent whose relatives are checked when selecting for milk yield.
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Total for this question: 1 mark
